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Consolidated Schedule of Investments
€ in Millions, £ in Millions, kr in Millions, kr in Millions, $ in Millions, $ in Millions, $ in Millions
Dec. 31, 2022
USD ($)
shares
Dec. 31, 2022
SEK (kr)
shares
Dec. 31, 2022
ISK (kr)
shares
Dec. 31, 2022
EUR (€)
shares
Dec. 31, 2022
GBP (£)
shares
Dec. 31, 2022
AUD ($)
shares
Dec. 31, 2022
CAD ($)
shares
Dec. 31, 2021
USD ($)
shares
Dec. 31, 2021
SEK (kr)
shares
Dec. 31, 2021
ISK (kr)
shares
Dec. 31, 2021
EUR (€)
shares
Dec. 31, 2021
GBP (£)
shares
Dec. 31, 2021
AUD ($)
shares
Dec. 31, 2021
CAD ($)
shares
Dec. 31, 2020
USD ($)
Amortized Cost $ 16,314.1             $ 16,056.7              
Fair Value $ 15,377.3 [1]             $ 16,101.5 [2]              
Liabilities in excess of other assets percentage 119.30% 119.30% 119.30% 119.30% 119.30% 119.30% 119.30% 108.30% 108.30% 108.30% 108.30% 108.30% 108.30% 108.30%  
Non Investment Assets Less Non Investment Liabilities $ (8,365.3) [1]             $ (8,371.5) [2]              
NET ASSETS—100% $ 7,012.0 [1]             $ 7,730.0 [2]              
Percent of net assets 219.30% 219.30% 219.30% 219.30% 219.30% 219.30% 219.30% 208.30% 208.30% 208.30% 208.30% 208.30% 208.30% 208.30%  
Net Senior Secured Loans—First Lien                              
Amortized Cost $ 9,607.5             $ 9,695.1              
Fair Value $ 9,278.4 [3]             $ 9,765.0              
Percent of net assets 132.30% 132.30% 132.30% 132.30% 132.30% 132.30% 132.30% 126.30% 126.30% 126.30% 126.30% 126.30% 126.30% 126.30%  
Net Senior Secured Loans—First Lien | Previously Reported                              
Fair Value [2]               $ 9,765.7              
Funded - Senior Secured Loans - First Lien                              
Amortized Cost $ 10,515.6             11,165.5              
Fair Value 10,186.5 [3]             11,236.1 [2]              
Unfunded - Senior Secured Loans - First Lien                              
Amortized Cost 908.1             1,470.4              
Fair Value 908.1 [3]             1,470.4 [2]              
Senior Secured Loans—Second Lien                              
Amortized Cost 1,299.2             1,564.4              
Fair Value $ 1,194.5 [3]             $ 1,556.5 [2]              
Percent of net assets 17.00% 17.00% 17.00% 17.00% 17.00% 17.00% 17.00% 20.10% 20.10% 20.10% 20.10% 20.10% 20.10% 20.10%  
Funded - Senior Secured Loan - Second Lien                              
Amortized Cost $ 1,302.3             $ 1,571.6              
Fair Value 1,197.6 [3]             1,563.7 [2]              
Unfunded - Senior Secured Loans - Second Lien                              
Amortized Cost 3.1             7.2              
Fair Value 3.1 [3]             7.2 [2]              
Other Senior Secured Debt                              
Amortized Cost 151.9             148.6              
Fair Value $ 109.8 [3]             $ 119.7 [2]              
Percent of net assets 1.60% 1.60% 1.60% 1.60% 1.60% 1.60% 1.60% 1.60% 1.60% 1.60% 1.60% 1.60% 1.60% 1.60%  
Subordinated Debt                              
Amortized Cost $ 383.9             $ 188.3              
Fair Value $ 265.0 [3]             $ 111.3 [2]              
Percent of net assets 3.80% 3.80% 3.80% 3.80% 3.80% 3.80% 3.80% 1.40% 1.40% 1.40% 1.40% 1.40% 1.40% 1.40%  
Asset Based Finance                              
Amortized Cost $ 2,023.6             $ 2,132.0              
Fair Value $ 1,902.5 [3]             $ 2,245.0 [2]              
Percent of net assets 27.10% 27.10% 27.10% 27.10% 27.10% 27.10% 27.10% 29.10% 29.10% 29.10% 29.10% 29.10% 29.10% 29.10%  
Funded - Asset Based Finance                              
Amortized Cost $ 2,067.2             $ 2,380.9              
Fair Value 1,946.1 [3]             2,493.9 [2]              
Unfunded - Asset Based Finance                              
Amortized Cost 43.6             248.9              
Fair Value 43.6 [3]             248.9 [2]              
Credit Opportunities Partners JV, LLC                              
Amortized Cost 1,571.7             1,396.7              
Fair Value $ 1,428.3 [3]             $ 1,396.2 [2]              
Percent of net assets 20.40% 20.40% 20.40% 20.40% 20.40% 20.40% 20.40% 18.10% 18.10% 18.10% 18.10% 18.10% 18.10% 18.10%  
Equity/Other                              
Amortized Cost $ 1,276.3             $ 931.6              
Fair Value $ 1,198.8 [1]             $ 907.1 [2]              
Percent of net assets 17.10% 17.10% 17.10% 17.10% 17.10% 17.10% 17.10% 11.70% 11.70% 11.70% 11.70% 11.70% 11.70% 11.70%  
Investment, Identifier [Axis]: 3Pillar Global Inc, Senior Secured Loans—First Lien, Revolving Credit Facility, Software & Services, November, 23 2026                              
Variable Rate [4]               6.00% 6.00% 6.00% 6.00% 6.00% 6.00% 6.00%  
Floor Rate [5]               0.80% 0.80% 0.80% 0.80% 0.80% 0.80% 0.80%  
Principal Amount [5],[6]               $ 9.2              
Amortized Cost [5]               9.2              
Fair Value [2],[5]               $ 9.1              
Investment, Identifier [Axis]: 3Pillar Global Inc, Senior Secured Loans—First Lien, Revolving Credit Facility, Software & Services, November, 23 2027 - 1                              
Variable Rate [7],[8],[9],[10]               6.00% 6.00% 6.00% 6.00% 6.00% 6.00% 6.00%  
Floor Rate [8],[9],[11]               0.80% 0.80% 0.80% 0.80% 0.80% 0.80% 0.80%  
Principal Amount [6],[8],[9],[11]               $ 96.3              
Amortized Cost [8],[9],[11]               95.3              
Fair Value [2],[8],[9],[11]               $ 95.3              
Investment, Identifier [Axis]: 3Pillar Global Inc, Senior Secured Loans—First Lien, Revolving Credit Facility, Software & Services, November, 23 2027 - 2                              
Variable Rate [4]               6.00% 6.00% 6.00% 6.00% 6.00% 6.00% 6.00%  
Floor Rate [5]               0.80% 0.80% 0.80% 0.80% 0.80% 0.80% 0.80%  
Principal Amount [5],[6]               $ 30.6              
Amortized Cost [5]               30.6              
Fair Value [2],[5]               $ 30.2              
Investment, Identifier [Axis]: 3Pillar Global Inc, Software & Services 1                              
Variable Rate [12],[13],[14],[15],[16] 6.00% 6.00% 6.00% 6.00% 6.00% 6.00% 6.00%                
Floor Rate [13],[14],[15],[16] 0.80% 0.80% 0.80% 0.80% 0.80% 0.80% 0.80%                
Principal Amount [13],[14],[15],[16],[17] $ 101.0                            
Amortized Cost [13],[14],[15],[16] 100.2                            
Fair Value [3],[13],[14],[15],[16] $ 96.7                            
Investment, Identifier [Axis]: 3Pillar Global Inc, Software & Services 2                              
Variable Rate [4],[12] 6.00% 6.00% 6.00% 6.00% 6.00% 6.00% 6.00%                
Floor Rate [4] 0.80% 0.80% 0.80% 0.80% 0.80% 0.80% 0.80%                
Principal Amount [4],[17] $ 9.2                            
Amortized Cost [4] 9.2                            
Fair Value [3],[4] $ 8.8                            
Investment, Identifier [Axis]: 3Pillar Global Inc, Software & Services 3                              
Variable Rate [4],[12] 6.00% 6.00% 6.00% 6.00% 6.00% 6.00% 6.00%                
Floor Rate [4] 0.80% 0.80% 0.80% 0.80% 0.80% 0.80% 0.80%                
Principal Amount [4],[17] $ 24.9                            
Amortized Cost [4] 24.9                            
Fair Value [3],[4] $ 23.8                            
Investment, Identifier [Axis]: 48Forty Solutions LLC, Commercial & Professional Services 1                              
Variable Rate [12],[13],[14],[15],[18],[19] 5.50% 5.50% 5.50% 5.50% 5.50% 5.50% 5.50%                
Floor Rate [13],[14],[15],[18],[19] 1.00% 1.00% 1.00% 1.00% 1.00% 1.00% 1.00%                
Principal Amount [13],[14],[15],[17],[18],[19] $ 182.7                            
Amortized Cost [13],[14],[15],[18],[19] 181.2                            
Fair Value [3],[13],[14],[15],[18],[19] $ 177.8                            
Investment, Identifier [Axis]: 48Forty Solutions LLC, Commercial & Professional Services 2                              
Variable Rate [4],[12] 5.50% 5.50% 5.50% 5.50% 5.50% 5.50% 5.50%                
Floor Rate [4] 1.00% 1.00% 1.00% 1.00% 1.00% 1.00% 1.00%                
Principal Amount [4],[17] $ 10.6                            
Amortized Cost [4] 10.6                            
Fair Value [3],[4] $ 10.3                            
Investment, Identifier [Axis]: 5 Arch Income Fund 2 LLC                              
Rate [20],[21],[22],[23],[24]               9.00% 9.00% 9.00% 9.00% 9.00% 9.00% 9.00%  
Principal Amount [6],[20],[21],[22],[23],[24]               $ 111.1              
Amortized Cost [20],[21],[22],[23],[24]               81.3              
Fair Value [2],[20],[21],[22],[23],[24]               78.3              
Investment, Identifier [Axis]: 5 Arch Income Fund 2 LLC, Diversified Financials                              
Rate [12],[25],[26],[27],[28],[29] 9.00% 9.00% 9.00% 9.00% 9.00% 9.00% 9.00%                
Principal Amount [17],[25],[26],[27],[28],[29] $ 95.5                            
Amortized Cost [25],[26],[27],[28],[29] 69.9                            
Fair Value [3],[25],[26],[27],[28],[29] 52.5                            
Investment, Identifier [Axis]: 801 5th Ave, Seattle, Private Equity                              
Fair Value $ 6.3             $ 23.1             $ 10.3
Investment, Identifier [Axis]: 801 5th Ave, Seattle, Private Equity, Real Estate                              
Number of Shares | shares 8,516,891 [15],[28],[29],[30] 8,516,891 [15],[28],[29],[30] 8,516,891 [15],[28],[29],[30] 8,516,891 [15],[28],[29],[30] 8,516,891 [15],[28],[29],[30] 8,516,891 [15],[28],[29],[30] 8,516,891 [15],[28],[29],[30] 8,554,983 [6],[23],[24],[31],[32] 8,554,983 [6],[23],[24],[31],[32] 8,554,983 [6],[23],[24],[31],[32] 8,554,983 [6],[23],[24],[31],[32] 8,554,983 [6],[23],[24],[31],[32] 8,554,983 [6],[23],[24],[31],[32] 8,554,983 [6],[23],[24],[31],[32]  
Amortized Cost $ 14.0 [15],[28],[29],[30]             $ 14.1 [23],[24],[31],[32]              
Fair Value 6.3 [3],[15],[28],[29],[30]             23.1 [2],[23],[24],[31],[32]              
Investment, Identifier [Axis]: 801 5th Ave, Seattle, Structure Mezzanine                              
Fair Value $ 58.9             $ 57.2             29.4
Investment, Identifier [Axis]: 801 5th Ave, Seattle, Structure Mezzanine, Real Estate                              
Variable Rate [12],[15],[29],[30] 8.00% 8.00% 8.00% 8.00% 8.00% 8.00% 8.00%                
Rate [7],[24],[31],[32]               8.00% 8.00% 8.00% 8.00% 8.00% 8.00% 8.00%  
PIK Rate 3.00% [12],[15],[29],[30] 3.00% [12],[15],[29],[30] 3.00% [12],[15],[29],[30] 3.00% [12],[15],[29],[30] 3.00% [12],[15],[29],[30] 3.00% [12],[15],[29],[30] 3.00% [12],[15],[29],[30] 3.00% [7],[24],[31],[32] 3.00% [7],[24],[31],[32] 3.00% [7],[24],[31],[32] 3.00% [7],[24],[31],[32] 3.00% [7],[24],[31],[32] 3.00% [7],[24],[31],[32] 3.00% [7],[24],[31],[32]  
Principal Amount $ 58.9 [15],[17],[29],[30]             $ 57.2 [6],[24],[31],[32]              
Amortized Cost 57.0 [15],[29],[30]             55.1 [24],[31],[32]              
Fair Value $ 58.9 [3],[15],[29],[30]             $ 57.2 [2],[24],[31],[32]              
Investment, Identifier [Axis]: 801 5th Ave, Seattle, Structure Mezzanine, Real Estate | Maximum                              
PIK Rate 3.00% [12],[15],[29],[30] 3.00% [12],[15],[29],[30] 3.00% [12],[15],[29],[30] 3.00% [12],[15],[29],[30] 3.00% [12],[15],[29],[30] 3.00% [12],[15],[29],[30] 3.00% [12],[15],[29],[30] 3.00% [7],[24],[31],[32] 3.00% [7],[24],[31],[32] 3.00% [7],[24],[31],[32] 3.00% [7],[24],[31],[32] 3.00% [7],[24],[31],[32] 3.00% [7],[24],[31],[32] 3.00% [7],[24],[31],[32]  
Investment, Identifier [Axis]: ASG Technologies, Common Stock                              
Fair Value               $ 0.0             42.7
Investment, Identifier [Axis]: ASG Technologies, Warrants                              
Fair Value               $ 0.0             3.5
Investment, Identifier [Axis]: ATX Networks Corp                              
PIK Rate [20],[23],[24],[31],[32],[33]               10.00% 10.00% 10.00% 10.00% 10.00% 10.00% 10.00%  
Principal Amount [6],[20],[23],[24],[31],[32],[33]               $ 18.3              
Amortized Cost [20],[23],[24],[31],[32],[33]               4.8              
Fair Value [2],[20],[23],[24],[31],[32],[33]               $ 7.1              
Investment, Identifier [Axis]: ATX Networks Corp | Maximum                              
PIK Rate [20],[23],[24],[31],[32],[33]               10.00% 10.00% 10.00% 10.00% 10.00% 10.00% 10.00%  
Investment, Identifier [Axis]: ATX Networks Corp 1                              
Variable Rate [24],[31],[32],[33]               7.50% 7.50% 7.50% 7.50% 7.50% 7.50% 7.50%  
Floor Rate [24],[31],[32],[33]               1.00% 1.00% 1.00% 1.00% 1.00% 1.00% 1.00%  
Principal Amount [6],[24],[31],[32],[33]               $ 46.8              
Amortized Cost [24],[31],[32],[33]               46.8              
Fair Value $ 40.6             46.8 [2],[24],[31],[32],[33]             0.0
Investment, Identifier [Axis]: ATX Networks Corp 2                              
Fair Value $ 21.9             7.1             0.0
Investment, Identifier [Axis]: ATX Networks Corp, Capital Goods 1                              
Variable Rate [12],[15],[29],[30],[34] 7.50% 7.50% 7.50% 7.50% 7.50% 7.50% 7.50%                
Floor Rate [15],[29],[30],[34] 1.00% 1.00% 1.00% 1.00% 1.00% 1.00% 1.00%                
Principal Amount [15],[17],[29],[30],[34] $ 40.6                            
Amortized Cost [15],[29],[30],[34] 40.6                            
Fair Value [3],[15],[29],[30],[34] $ 40.6                            
Investment, Identifier [Axis]: ATX Networks Corp, Capital Goods 2                              
PIK Rate [12] 10.00% 10.00% 10.00% 10.00% 10.00% 10.00% 10.00%                
Principal Amount [15],[17],[29],[30],[34],[35] $ 21.9                            
Amortized Cost [15],[29],[30],[34],[35] 8.4                            
Fair Value [3],[15],[29],[30],[34],[35] $ 21.9                            
Investment, Identifier [Axis]: ATX Networks Corp, Capital Goods 2 | Maximum                              
PIK Rate [12] 10.00% 10.00% 10.00% 10.00% 10.00% 10.00% 10.00%                
Investment, Identifier [Axis]: ATX Networks Corp, Class B-1 Common Stock                              
Fair Value $ 5.0             0.0              
Investment, Identifier [Axis]: ATX Networks Corp, Class B-1 Common Stock, Capital Goods                              
Number of Shares | shares [15],[28],[29],[30] 500 500 500 500 500 500 500                
Amortized Cost [15],[28],[29],[30] $ 5.0                            
Fair Value [1],[15],[28],[29],[30] 5.0                            
Investment, Identifier [Axis]: ATX Networks Corp, Class B-2 Common Stock                              
Fair Value $ 9.0             0.0              
Investment, Identifier [Axis]: ATX Networks Corp, Class B-2 Common Stock, Capital Goods                              
Number of Shares | shares [15],[28],[29],[30] 900 900 900 900 900 900 900                
Amortized Cost [15],[28],[29],[30] $ 4.0                            
Fair Value [1],[15],[28],[29],[30] 9.0                            
Investment, Identifier [Axis]: ATX Networks Corp, Common Stock                              
Fair Value $ 29.2             $ 0.0             0.0
Investment, Identifier [Axis]: ATX Networks Corp, Common Stock, Capital Goods                              
Number of Shares | shares 4,214 [15],[28],[29],[30],[34],[35] 4,214 [15],[28],[29],[30],[34],[35] 4,214 [15],[28],[29],[30],[34],[35] 4,214 [15],[28],[29],[30],[34],[35] 4,214 [15],[28],[29],[30],[34],[35] 4,214 [15],[28],[29],[30],[34],[35] 4,214 [15],[28],[29],[30],[34],[35] 3,483 [23],[24],[31],[32],[33] 3,483 [23],[24],[31],[32],[33] 3,483 [23],[24],[31],[32],[33] 3,483 [23],[24],[31],[32],[33] 3,483 [23],[24],[31],[32],[33] 3,483 [23],[24],[31],[32],[33] 3,483 [23],[24],[31],[32],[33]  
Amortized Cost $ 1.7 [15],[28],[29],[30],[34],[35]             $ 0.0 [23],[24],[31],[32],[33]              
Fair Value $ 29.2 [1],[15],[28],[29],[30],[34],[35]             $ 0.0 [2],[23],[24],[31],[32],[33]              
Investment, Identifier [Axis]: AVF Parent LLC, Trade Claim, Retailing                              
Number of Shares | shares 44,507 [15],[28] 44,507 [15],[28] 44,507 [15],[28] 44,507 [15],[28] 44,507 [15],[28] 44,507 [15],[28] 44,507 [15],[28] 44,507 [23],[32] 44,507 [23],[32] 44,507 [23],[32] 44,507 [23],[32] 44,507 [23],[32] 44,507 [23],[32] 44,507 [23],[32]  
Amortized Cost $ 0.0 [15],[28]             $ 0.0 [23],[32]              
Fair Value $ 0.0 [1],[15],[28]             $ 0.0 [2],[23],[32]              
Investment, Identifier [Axis]: Abaco Energy Technologies LLC, Common Stock, Energy                              
Number of Shares | shares 3,055,556 [15],[28] 3,055,556 [15],[28] 3,055,556 [15],[28] 3,055,556 [15],[28] 3,055,556 [15],[28] 3,055,556 [15],[28] 3,055,556 [15],[28] 3,055,556 [23],[32] 3,055,556 [23],[32] 3,055,556 [23],[32] 3,055,556 [23],[32] 3,055,556 [23],[32] 3,055,556 [23],[32] 3,055,556 [23],[32]  
Amortized Cost $ 0.2 [15],[28]             $ 0.2 [23],[32]              
Fair Value $ 0.5 [1],[15],[28]             $ 0.3 [2],[23],[32]              
Investment, Identifier [Axis]: Abaco Energy Technologies LLC, Preferred Stock, Energy                              
Number of Shares | shares 12,734,481 [15],[28] 12,734,481 [15],[28] 12,734,481 [15],[28] 12,734,481 [15],[28] 12,734,481 [15],[28] 12,734,481 [15],[28] 12,734,481 [15],[28] 12,734,481 [23],[32] 12,734,481 [23],[32] 12,734,481 [23],[32] 12,734,481 [23],[32] 12,734,481 [23],[32] 12,734,481 [23],[32] 12,734,481 [23],[32]  
Amortized Cost $ 1.5 [15],[28]             $ 1.5 [23],[32]              
Fair Value $ 3.7 [1],[15],[28]             $ 1.7 [2],[23],[32]              
Investment, Identifier [Axis]: Abacus JV, Private Equity, Insurance                              
Number of Shares | shares 49,223,047 [15],[29] 49,223,047 [15],[29] 49,223,047 [15],[29] 49,223,047 [15],[29] 49,223,047 [15],[29] 49,223,047 [15],[29] 49,223,047 [15],[29] 44,833,382 [6],[24],[32] 44,833,382 [6],[24],[32] 44,833,382 [6],[24],[32] 44,833,382 [6],[24],[32] 44,833,382 [6],[24],[32] 44,833,382 [6],[24],[32] 44,833,382 [6],[24],[32]  
Amortized Cost $ 48.2 [15],[29]             $ 43.8 [24],[32]              
Fair Value $ 53.3 [3],[15],[29]             $ 48.1 [2],[24],[32]              
Investment, Identifier [Axis]: Accelerator Investments Aggregator LP, Private Equity, Diversified Financials                              
Number of Shares | shares 3,869,291 [15],[28],[29] 3,869,291 [15],[28],[29] 3,869,291 [15],[28],[29] 3,869,291 [15],[28],[29] 3,869,291 [15],[28],[29] 3,869,291 [15],[28],[29] 3,869,291 [15],[28],[29] 5,397,365 [6],[23],[24],[32] 5,397,365 [6],[23],[24],[32] 5,397,365 [6],[23],[24],[32] 5,397,365 [6],[23],[24],[32] 5,397,365 [6],[23],[24],[32] 5,397,365 [6],[23],[24],[32] 5,397,365 [6],[23],[24],[32]  
Amortized Cost $ 4.5 [15],[28],[29]             $ 6.3 [23],[24],[32]              
Fair Value $ 3.4 [3],[15],[28],[29]             $ 4.7 [2],[23],[24],[32]              
Investment, Identifier [Axis]: Accuride Corp                              
Variable Rate [9],[36]               5.25% 5.25% 5.25% 5.25% 5.25% 5.25% 5.25%  
Floor Rate [9],[36]               1.00% 1.00% 1.00% 1.00% 1.00% 1.00% 1.00%  
Principal Amount [6],[9],[36]               $ 9.0              
Amortized Cost [9],[36]               8.1              
Fair Value [2],[9],[36]               $ 8.7              
Investment, Identifier [Axis]: Accuride Corp, Capital Goods                              
Variable Rate [12],[14],[37] 5.25% 5.25% 5.25% 5.25% 5.25% 5.25% 5.25%                
Floor Rate [14],[37] 1.00% 1.00% 1.00% 1.00% 1.00% 1.00% 1.00%                
Principal Amount [14],[17],[37] $ 8.9                            
Amortized Cost [14],[37] 8.4                            
Fair Value [3],[14],[37] $ 7.6                            
Investment, Identifier [Axis]: Advanced Dermatology & Cosmetic Surgery ,Senior Secured Loans—First Lien, Health Care Equipment & Services, Maturing May, 7 2026                              
Variable Rate [4]               6.25% 6.25% 6.25% 6.25% 6.25% 6.25% 6.25%  
Floor Rate [5]               1.00% 1.00% 1.00% 1.00% 1.00% 1.00% 1.00%  
Principal Amount [5],[6]               $ 3.6              
Amortized Cost [5]               3.6              
Fair Value [2],[5]               $ 3.6              
Investment, Identifier [Axis]: Advanced Dermatology & Cosmetic Surgery ,Senior Secured Loans—First Lien, Health Care Equipment & Services, Maturing May, 7 2027 - 1                              
Variable Rate [32],[38],[39]               6.25% 6.25% 6.25% 6.25% 6.25% 6.25% 6.25%  
Floor Rate [32],[38],[39]               1.00% 1.00% 1.00% 1.00% 1.00% 1.00% 1.00%  
Principal Amount [6],[32],[38],[39]               $ 44.8              
Amortized Cost [32],[38],[39]               42.9              
Fair Value [2],[32],[38],[39]               $ 45.0              
Investment, Identifier [Axis]: Advanced Dermatology & Cosmetic Surgery ,Senior Secured Loans—First Lien, Health Care Equipment & Services, Maturing May, 7 2027- 2                              
Variable Rate [5]               6.25% 6.25% 6.25% 6.25% 6.25% 6.25% 6.25%  
Floor Rate [5]               1.00% 1.00% 1.00% 1.00% 1.00% 1.00% 1.00%  
Principal Amount [5],[6]               $ 4.2              
Amortized Cost [5]               4.2              
Fair Value [2],[5]               4.2              
Investment, Identifier [Axis]: Advanced Dermatology & Cosmetic Surgery, Health Care Equipment & Services 1                              
Variable Rate [12],[15],[19],[40] 6.50% 6.50% 6.50% 6.50% 6.50% 6.50% 6.50%                
Floor Rate [15],[19],[40] 1.00% 1.00% 1.00% 1.00% 1.00% 1.00% 1.00%                
Principal Amount [15],[17],[19],[40] $ 46.3                            
Amortized Cost [15],[19],[40] 44.7                            
Fair Value [3],[15],[19],[40] $ 45.6                            
Investment, Identifier [Axis]: Advanced Dermatology & Cosmetic Surgery, Health Care Equipment & Services 2                              
Variable Rate [12] 6.50% 6.50% 6.50% 6.50% 6.50% 6.50% 6.50%                
Floor Rate [15] 1.00% 1.00% 1.00% 1.00% 1.00% 1.00% 1.00%                
Principal Amount [15],[17] $ 2.2                            
Amortized Cost [15] 2.2                            
Fair Value [3],[15] $ 2.2                            
Investment, Identifier [Axis]: Advanced Dermatology & Cosmetic Surgery, Health Care Equipment & Services 3                              
Variable Rate [4],[12] 6.50% 6.50% 6.50% 6.50% 6.50% 6.50% 6.50%                
Floor Rate [4] 1.00% 1.00% 1.00% 1.00% 1.00% 1.00% 1.00%                
Principal Amount [4],[17] $ 3.6                            
Amortized Cost [4] 3.6                            
Fair Value [3],[4] $ 3.5                            
Investment, Identifier [Axis]: Advanced Lighting Technologies Inc 1                              
Fair Value               0.0             12.0
Investment, Identifier [Axis]: Advanced Lighting Technologies Inc 2                              
Fair Value               0.0             0.0
Investment, Identifier [Axis]: Advanced Lighting Technologies Inc, Common Stock                              
Fair Value               $ 0.0             0.0
Investment, Identifier [Axis]: Advanced Lighting Technologies Inc, Materials                              
PIK Rate [12] 16.00% 16.00% 16.00% 16.00% 16.00% 16.00% 16.00%                
Floor Rate [15],[25],[28] 1.00% 1.00% 1.00% 1.00% 1.00% 1.00% 1.00%                
Principal Amount [15],[17],[25],[28] $ 13.5                            
Amortized Cost [15],[25],[28] 10.5                            
Fair Value [3],[15],[25],[28] $ 3.4                            
Investment, Identifier [Axis]: Advanced Lighting Technologies Inc, Materials | Maximum                              
PIK Rate [12] 16.00% 16.00% 16.00% 16.00% 16.00% 16.00% 16.00%                
Investment, Identifier [Axis]: Advanced Lighting Technologies Inc, Senior Secured Loans, Second Lien                              
Variable Rate [20],[23],[32]               6.00% 6.00% 6.00% 6.00% 6.00% 6.00% 6.00%  
Floor Rate [20],[23],[32]               1.00% 1.00% 1.00% 1.00% 1.00% 1.00% 1.00%  
Principal Amount [6],[20],[23],[32]               $ 11.3              
Amortized Cost [20],[23],[32]               10.5              
Fair Value [2],[20],[23],[32]               6.4              
Investment, Identifier [Axis]: Advanced Lighting Technologies Inc, Warrant                              
Fair Value               $ 0.0             0.0
Investment, Identifier [Axis]: Advania Sverige AB, Senior Secured Loans—First Lien, Software & Services, April 28, 2028 - 1                              
Variable Rate [24],[32]               6.10% 6.10% 6.10% 6.10% 6.10% 6.10% 6.10%  
PIK Rate [24],[32]               0.00% 0.00% 0.00% 0.00% 0.00% 0.00% 0.00%  
Floor Rate [24],[32]               0.00% 0.00% 0.00% 0.00% 0.00% 0.00% 0.00%  
Principal Amount | kr [6],[24],[32]                 kr 629.4            
Amortized Cost [24],[32]               $ 67.9              
Fair Value [2],[24],[32]               $ 68.9              
Investment, Identifier [Axis]: Advania Sverige AB, Senior Secured Loans—First Lien, Software & Services, April 28, 2028 - 1 | Maximum                              
PIK Rate [24],[32]               3.30% 3.30% 3.30% 3.30% 3.30% 3.30% 3.30%  
Investment, Identifier [Axis]: Advania Sverige AB, Senior Secured Loans—First Lien, Software & Services, April 28, 2028 -2                              
Variable Rate [24],[32]               6.10% 6.10% 6.10% 6.10% 6.10% 6.10% 6.10%  
PIK Rate [24],[32]               0.00% 0.00% 0.00% 0.00% 0.00% 0.00% 0.00%  
Floor Rate [24],[32]               0.00% 0.00% 0.00% 0.00% 0.00% 0.00% 0.00%  
Principal Amount | kr [6],[24],[32]                   kr 1,345.8          
Amortized Cost [24],[32]               $ 10.0              
Fair Value [2],[24],[32]               $ 10.3              
Investment, Identifier [Axis]: Advania Sverige AB, Senior Secured Loans—First Lien, Software & Services, April 28, 2028 -2 | Maximum                              
PIK Rate [24],[32]               3.30% 3.30% 3.30% 3.30% 3.30% 3.30% 3.30%  
Investment, Identifier [Axis]: Advania Sverige AB, Senior Secured Loans—First Lien, Software & Services, April 28, 2028 -3                              
Variable Rate [5],[24]               6.10% 6.10% 6.10% 6.10% 6.10% 6.10% 6.10%  
PIK Rate [5],[24]               0.00% 0.00% 0.00% 0.00% 0.00% 0.00% 0.00%  
Floor Rate [5],[24]               0.00% 0.00% 0.00% 0.00% 0.00% 0.00% 0.00%  
Principal Amount | kr [5],[6],[24]                 kr 304.1            
Amortized Cost [5],[24]               $ 37.5              
Fair Value [2],[5],[24]               $ 37.2              
Investment, Identifier [Axis]: Advania Sverige AB, Senior Secured Loans—First Lien, Software & Services, April 28, 2028 -3 | Maximum                              
PIK Rate [5],[24]               3.30% 3.30% 3.30% 3.30% 3.30% 3.30% 3.30%  
Investment, Identifier [Axis]: Advania Sverige AB, Software & Services 1                              
Variable Rate [12],[15],[29] 6.10% 6.10% 6.10% 6.10% 6.10% 6.10% 6.10%                
PIK Rate [12],[15],[29] 0.00% 0.00% 0.00% 0.00% 0.00% 0.00% 0.00%                
Floor Rate [15],[29] 0.00% 0.00% 0.00% 0.00% 0.00% 0.00% 0.00%                
Principal Amount | kr [15],[17],[29]   kr 933.6                          
Amortized Cost [15],[29] $ 106.1                            
Fair Value [3],[15],[29] $ 86.0                            
Investment, Identifier [Axis]: Advania Sverige AB, Software & Services 1 | Maximum                              
PIK Rate [12],[15],[29] 3.30% 3.30% 3.30% 3.30% 3.30% 3.30% 3.30%                
Investment, Identifier [Axis]: Advania Sverige AB, Software & Services 2                              
Variable Rate [12],[15],[29] 6.10% 6.10% 6.10% 6.10% 6.10% 6.10% 6.10%                
PIK Rate [12],[15],[29] 0.00% 0.00% 0.00% 0.00% 0.00% 0.00% 0.00%                
Floor Rate [15],[29] 0.00% 0.00% 0.00% 0.00% 0.00% 0.00% 0.00%                
Principal Amount | kr [15],[17],[29]     kr 1,345.8                        
Amortized Cost [15],[29] $ 10.1                            
Fair Value [3],[15],[29] $ 9.2                            
Investment, Identifier [Axis]: Advania Sverige AB, Software & Services 2 | Maximum                              
PIK Rate [12],[15],[29] 3.30% 3.30% 3.30% 3.30% 3.30% 3.30% 3.30%                
Investment, Identifier [Axis]: Affordable Care Inc 1                              
Fair Value $ 0.0             $ 0.0             0.0
Investment, Identifier [Axis]: Affordable Care Inc 2                              
Fair Value 53.1             59.9             0.0
Investment, Identifier [Axis]: Affordable Care Inc, Common Stock                              
Fair Value $ 49.9             $ 52.1             0.0
Investment, Identifier [Axis]: Affordable Care Inc, Health Care Equipment & Services 1                              
Variable Rate [12],[15],[40],[41] 5.50% 5.50% 5.50% 5.50% 5.50% 5.50% 5.50%                
PIK Rate [12],[15],[40],[41] 0.00% 0.00% 0.00% 0.00% 0.00% 0.00% 0.00%                
Floor Rate [15],[40],[41] 0.80% 0.80% 0.80% 0.80% 0.80% 0.80% 0.80%                
Principal Amount [15],[17],[40],[41] $ 53.6                            
Amortized Cost [15],[40],[41] 53.3                            
Fair Value [3],[15],[40],[41] $ 52.5                            
Investment, Identifier [Axis]: Affordable Care Inc, Health Care Equipment & Services 1 | Maximum                              
PIK Rate [12],[15],[40],[41] 1.30% 1.30% 1.30% 1.30% 1.30% 1.30% 1.30%                
Investment, Identifier [Axis]: Affordable Care Inc, Health Care Equipment & Services 2                              
Variable Rate [12],[15],[41] 5.50% 5.50% 5.50% 5.50% 5.50% 5.50% 5.50%                
PIK Rate [12],[15],[41] 0.00% 0.00% 0.00% 0.00% 0.00% 0.00% 0.00%                
Floor Rate [15],[41] 0.80% 0.80% 0.80% 0.80% 0.80% 0.80% 0.80%                
Principal Amount [15],[17],[41] $ 1.4                            
Amortized Cost [15],[41] 1.4                            
Fair Value [3],[15],[41] $ 1.4                            
Investment, Identifier [Axis]: Affordable Care Inc, Health Care Equipment & Services 2 | Maximum                              
PIK Rate [12],[15],[41] 1.30% 1.30% 1.30% 1.30% 1.30% 1.30% 1.30%                
Investment, Identifier [Axis]: Affordable Care Inc, Health Care Equipment & Services 3                              
Variable Rate [4],[12],[41] 5.50% 5.50% 5.50% 5.50% 5.50% 5.50% 5.50%                
PIK Rate [4],[12],[41] 0.00% 0.00% 0.00% 0.00% 0.00% 0.00% 0.00%                
Floor Rate [4],[41] 0.80% 0.80% 0.80% 0.80% 0.80% 0.80% 0.80%                
Principal Amount [4],[17],[41] $ 28.4                            
Amortized Cost [4],[41] 28.4                            
Fair Value [3],[4],[41] $ 27.8                            
Investment, Identifier [Axis]: Affordable Care Inc, Health Care Equipment & Services 3 | Maximum                              
PIK Rate [4],[12],[41] 1.30% 1.30% 1.30% 1.30% 1.30% 1.30% 1.30%                
Investment, Identifier [Axis]: Affordable Care Inc, Health Care Equipment & Services 4                              
Variable Rate [4],[12],[41] 5.50% 5.50% 5.50% 5.50% 5.50% 5.50% 5.50%                
PIK Rate [4],[12],[41] 0.00% 0.00% 0.00% 0.00% 0.00% 0.00% 0.00%                
Floor Rate [4],[41] 0.80% 0.80% 0.80% 0.80% 0.80% 0.80% 0.80%                
Principal Amount [4],[17],[41] $ 11.4                            
Amortized Cost [4],[41] 11.4                            
Fair Value [3],[4],[41] $ 11.2                            
Investment, Identifier [Axis]: Affordable Care Inc, Health Care Equipment & Services 4 | Maximum                              
PIK Rate [4],[12],[41] 1.30% 1.30% 1.30% 1.30% 1.30% 1.30% 1.30%                
Investment, Identifier [Axis]: Affordable Care Inc, Preferred Stock, Health Care Equipment & Services                              
PIK Rate 11.80% [12],[15],[41] 11.80% [12],[15],[41] 11.80% [12],[15],[41] 11.80% [12],[15],[41] 11.80% [12],[15],[41] 11.80% [12],[15],[41] 11.80% [12],[15],[41] 11.80% [7],[32],[42] 11.80% [7],[32],[42] 11.80% [7],[32],[42] 11.80% [7],[32],[42] 11.80% [7],[32],[42] 11.80% [7],[32],[42] 11.80% [7],[32],[42]  
Number of Shares | shares 49,073,000 [15],[41] 49,073,000 [15],[41] 49,073,000 [15],[41] 49,073,000 [15],[41] 49,073,000 [15],[41] 49,073,000 [15],[41] 49,073,000 [15],[41] 49,073,000 [32],[42] 49,073,000 [32],[42] 49,073,000 [32],[42] 49,073,000 [32],[42] 49,073,000 [32],[42] 49,073,000 [32],[42] 49,073,000 [32],[42]  
Amortized Cost $ 48.1 [15],[41]             $ 48.1 [32],[42]              
Fair Value $ 49.9 [1],[15],[41]             $ 52.1 [2],[32],[42]              
Investment, Identifier [Axis]: Affordable Care Inc, Preferred Stock, Health Care Equipment & Services | Maximum                              
PIK Rate 11.80% [12],[15],[41] 11.80% [12],[15],[41] 11.80% [12],[15],[41] 11.80% [12],[15],[41] 11.80% [12],[15],[41] 11.80% [12],[15],[41] 11.80% [12],[15],[41] 11.80% [7],[32],[42] 11.80% [7],[32],[42] 11.80% [7],[32],[42] 11.80% [7],[32],[42] 11.80% [7],[32],[42] 11.80% [7],[32],[42] 11.80% [7],[32],[42]  
Investment, Identifier [Axis]: Affordable Care Inc, Senior Secured Loans—First Lien, Health Care Equipment & Services, Maturing August 2, 2027                              
Variable Rate [5],[42]               5.50% 5.50% 5.50% 5.50% 5.50% 5.50% 5.50%  
PIK Rate [5],[42]               0.00% 0.00% 0.00% 0.00% 0.00% 0.00% 0.00%  
Floor Rate [5],[42]               0.80% 0.80% 0.80% 0.80% 0.80% 0.80% 0.80%  
Principal Amount [5],[6],[42]               $ 12.8              
Amortized Cost [5],[42]               12.8              
Fair Value [2],[5],[42]               $ 12.8              
Investment, Identifier [Axis]: Affordable Care Inc, Senior Secured Loans—First Lien, Health Care Equipment & Services, Maturing August 2, 2027 | Maximum                              
PIK Rate [5],[42]               1.30% 1.30% 1.30% 1.30% 1.30% 1.30% 1.30%  
Investment, Identifier [Axis]: Affordable Care Inc, Senior Secured Loans—First Lien, Health Care Equipment & Services, Maturing August 2, 2028 -1                              
Variable Rate [32],[42]               5.50% 5.50% 5.50% 5.50% 5.50% 5.50% 5.50%  
PIK Rate [32],[42]               0.00% 0.00% 0.00% 0.00% 0.00% 0.00% 0.00%  
Floor Rate [32],[42]               0.80% 0.80% 0.80% 0.80% 0.80% 0.80% 0.80%  
Principal Amount [6],[32],[42]               $ 60.4              
Amortized Cost [32],[42]               59.9              
Fair Value [2],[32],[42]               $ 60.1              
Investment, Identifier [Axis]: Affordable Care Inc, Senior Secured Loans—First Lien, Health Care Equipment & Services, Maturing August 2, 2028 -1 | Maximum                              
PIK Rate [32],[42]               1.30% 1.30% 1.30% 1.30% 1.30% 1.30% 1.30%  
Investment, Identifier [Axis]: Affordable Care Inc, Senior Secured Loans—First Lien, Health Care Equipment & Services, Maturing August 2, 2028 -2                              
Variable Rate [5],[42]               5.50% 5.50% 5.50% 5.50% 5.50% 5.50% 5.50%  
PIK Rate [5],[42]               0.00% 0.00% 0.00% 0.00% 0.00% 0.00% 0.00%  
Floor Rate [5],[42]               0.80% 0.80% 0.80% 0.80% 0.80% 0.80% 0.80%  
Principal Amount [5],[6],[42]               $ 43.1              
Amortized Cost [5],[42]               43.1              
Fair Value [2],[5],[42]               $ 42.9              
Investment, Identifier [Axis]: Affordable Care Inc, Senior Secured Loans—First Lien, Health Care Equipment & Services, Maturing August 2, 2028 -2 | Maximum                              
PIK Rate [5],[42]               1.30% 1.30% 1.30% 1.30% 1.30% 1.30% 1.30%  
Investment, Identifier [Axis]: Alacrity Solutions Group LLC, Senior Secured Loans—First Lien, Insurance, Maturing December 22, 2027 -1                              
Variable Rate [32]               5.25% 5.25% 5.25% 5.25% 5.25% 5.25% 5.25%  
Floor Rate [32]               0.80% 0.80% 0.80% 0.80% 0.80% 0.80% 0.80%  
Principal Amount [6],[32]               $ 1.1              
Amortized Cost [32]               0.9              
Fair Value [2],[32]               $ 1.1              
Investment, Identifier [Axis]: Alacrity Solutions Group LLC, Senior Secured Loans—First Lien, Insurance, Maturing December 22, 2027-2                              
Variable Rate [5]               5.25% 5.25% 5.25% 5.25% 5.25% 5.25% 5.25%  
Floor Rate [5]               0.80% 0.80% 0.80% 0.80% 0.80% 0.80% 0.80%  
Principal Amount [5],[6]               $ 9.7              
Amortized Cost [5]               9.7              
Fair Value [2],[5]               $ 9.5              
Investment, Identifier [Axis]: Alacrity Solutions Group LLC, Senior Secured Loans—First Lien, Insurance, Maturing December 22, 2028                              
Variable Rate [32]               5.25% 5.25% 5.25% 5.25% 5.25% 5.25% 5.25%  
Floor Rate [32]               0.80% 0.80% 0.80% 0.80% 0.80% 0.80% 0.80%  
Principal Amount [6],[32]               $ 69.2              
Amortized Cost [32]               68.2              
Fair Value [2],[32]               $ 68.2              
Investment, Identifier [Axis]: Alacrity Solutions Group LLC, Insurance 1                              
Variable Rate [12],[15] 5.25% 5.25% 5.25% 5.25% 5.25% 5.25% 5.25%                
Floor Rate [15] 0.80% 0.80% 0.80% 0.80% 0.80% 0.80% 0.80%                
Principal Amount [15],[17] $ 28.4                            
Amortized Cost [15] 28.0                            
Fair Value [3],[15] $ 27.3                            
Investment, Identifier [Axis]: Alacrity Solutions Group LLC, Insurance 2                              
Variable Rate [4],[12] 5.25% 5.25% 5.25% 5.25% 5.25% 5.25% 5.25%                
Floor Rate [4] 0.80% 0.80% 0.80% 0.80% 0.80% 0.80% 0.80%                
Principal Amount [4],[17] $ 10.8                            
Amortized Cost [4] 10.6                            
Fair Value [3],[4] $ 10.4                            
Investment, Identifier [Axis]: Alera Group Intermediate Holdings Inc, Alacrity Solutions Group LLC, Senior Secured Loans—First Lien, Insurance, Maturing October 2, 2028 -1                              
Variable Rate [32]               5.50% 5.50% 5.50% 5.50% 5.50% 5.50% 5.50%  
Floor Rate [32]               0.80% 0.80% 0.80% 0.80% 0.80% 0.80% 0.80%  
Principal Amount [6],[32]               $ 21.4              
Amortized Cost [32]               21.2              
Fair Value [2],[32]               $ 21.2              
Investment, Identifier [Axis]: Alera Group Intermediate Holdings Inc, Alacrity Solutions Group LLC, Senior Secured Loans—First Lien, Insurance, Maturing October 2, 2028 -2                              
Variable Rate [5]               5.50% 5.50% 5.50% 5.50% 5.50% 5.50% 5.50%  
Floor Rate [5]               0.80% 0.80% 0.80% 0.80% 0.80% 0.80% 0.80%  
Principal Amount [5],[6]               $ 22.9              
Amortized Cost [5]               22.9              
Fair Value [2],[5]               $ 22.7              
Investment, Identifier [Axis]: Alera Group Intermediate Holdings Inc, Insurance 1                              
Variable Rate [12],[15] 6.00% 6.00% 6.00% 6.00% 6.00% 6.00% 6.00%                
Floor Rate [40] 0.80% 0.80% 0.80% 0.80% 0.80% 0.80% 0.80%                
Principal Amount [17],[40] $ 9.2                            
Amortized Cost [40] 9.1                            
Fair Value [3],[40] $ 8.7                            
Investment, Identifier [Axis]: Alera Group Intermediate Holdings Inc, Insurance 2                              
Variable Rate [12],[15] 6.00% 6.00% 6.00% 6.00% 6.00% 6.00% 6.00%                
Floor Rate [15],[40] 0.80% 0.80% 0.80% 0.80% 0.80% 0.80% 0.80%                
Principal Amount [15],[17],[40] $ 22.5                            
Amortized Cost [15],[40] 22.5                            
Fair Value [3],[15],[40] $ 21.4                            
Investment, Identifier [Axis]: Altavair AirFinance, Private Equity, Capital Goods                              
Number of Shares | shares 140,212,883 [15],[29] 140,212,883 [15],[29] 140,212,883 [15],[29] 140,212,883 [15],[29] 140,212,883 [15],[29] 140,212,883 [15],[29] 140,212,883 [15],[29] 94,679,609 [6],[24],[32] 94,679,609 [6],[24],[32] 94,679,609 [6],[24],[32] 94,679,609 [6],[24],[32] 94,679,609 [6],[24],[32] 94,679,609 [6],[24],[32] 94,679,609 [6],[24],[32]  
Amortized Cost $ 141.1 [15],[29]             $ 95.6 [24],[32]              
Fair Value $ 162.1 [3],[15],[29]             $ 114.3 [2],[24],[32]              
Investment, Identifier [Axis]: American Vision Partners, Health Care Equipment & Services 1                              
Variable Rate [12],[15],[16] 5.75% 5.75% 5.75% 5.75% 5.75% 5.75% 5.75%                
Floor Rate [15],[16] 0.80% 0.80% 0.80% 0.80% 0.80% 0.80% 0.80%                
Principal Amount [15],[16],[17] $ 113.0                            
Amortized Cost [15],[16] 112.5                            
Fair Value [3],[15],[16] $ 109.1                            
Investment, Identifier [Axis]: American Vision Partners, Health Care Equipment & Services 2                              
Variable Rate [4],[12] 5.75% 5.75% 5.75% 5.75% 5.75% 5.75% 5.75%                
Floor Rate [4] 0.80% 0.80% 0.80% 0.80% 0.80% 0.80% 0.80%                
Principal Amount [4],[17] $ 7.8                            
Amortized Cost [4] 7.8                            
Fair Value [3],[4] $ 7.5                            
Investment, Identifier [Axis]: American Vision Partners, Private Equity, Health Care Equipment & Services                              
Number of Shares | shares 2,655,491 [15],[28] 2,655,491 [15],[28] 2,655,491 [15],[28] 2,655,491 [15],[28] 2,655,491 [15],[28] 2,655,491 [15],[28] 2,655,491 [15],[28] 2,450,230 [23],[32] 2,450,230 [23],[32] 2,450,230 [23],[32] 2,450,230 [23],[32] 2,450,230 [23],[32] 2,450,230 [23],[32] 2,450,230 [23],[32]  
Amortized Cost $ 2.7 [15],[28]             $ 2.5 [23],[32]              
Fair Value $ 2.2 [1],[15],[28]             $ 2.4 [2],[23],[32]              
Investment, Identifier [Axis]: American Vision Partners, Senior Secured Loans—First Lien, Health Care Equipment & Services, Maturing September 30, 2026                              
Variable Rate [5]               5.75% 5.75% 5.75% 5.75% 5.75% 5.75% 5.75%  
Floor Rate [5]               0.80% 0.80% 0.80% 0.80% 0.80% 0.80% 0.80%  
Principal Amount [5],[6]               $ 7.8              
Amortized Cost [5]               7.8              
Fair Value [2],[5]               $ 7.7              
Investment, Identifier [Axis]: American Vision Partners, Senior Secured Loans—First Lien, Health Care Equipment & Services, Maturing September 30, 2027 -1                              
Variable Rate [10],[32]               5.75% 5.75% 5.75% 5.75% 5.75% 5.75% 5.75%  
Floor Rate [10],[32]               0.80% 0.80% 0.80% 0.80% 0.80% 0.80% 0.80%  
Principal Amount [6],[10],[32]               $ 94.7              
Amortized Cost [10],[32]               93.8              
Fair Value [2],[10],[32]               $ 94.3              
Investment, Identifier [Axis]: American Vision Partners, Senior Secured Loans—First Lien, Health Care Equipment & Services, Maturing September 30, 2027 -2                              
Variable Rate [5]               5.75% 5.75% 5.75% 5.75% 5.75% 5.75% 5.75%  
Floor Rate [5]               0.80% 0.80% 0.80% 0.80% 0.80% 0.80% 0.80%  
Principal Amount [5],[6]               $ 38.9              
Amortized Cost [5]               38.9              
Fair Value [2],[5]               $ 38.7              
Investment, Identifier [Axis]: Amerivet Partners Management Inc, Health Care Equipment & Services 1                              
Variable Rate [12],[15] 5.50% 5.50% 5.50% 5.50% 5.50% 5.50% 5.50%                
Floor Rate [15] 0.80% 0.80% 0.80% 0.80% 0.80% 0.80% 0.80%                
Principal Amount [15],[17] $ 95.4                            
Amortized Cost [15] 94.5                            
Fair Value [3],[15] $ 91.8                            
Investment, Identifier [Axis]: Amerivet Partners Management Inc, Health Care Equipment & Services 2                              
Variable Rate [12],[15] 5.50% 5.50% 5.50% 5.50% 5.50% 5.50% 5.50%                
Floor Rate [15] 0.80% 0.80% 0.80% 0.80% 0.80% 0.80% 0.80%                
Principal Amount [15],[17] $ 17.2                            
Amortized Cost [15] 17.2                            
Fair Value [3],[15] $ 16.6                            
Investment, Identifier [Axis]: Amerivet Partners Management Inc, Health Care Equipment & Services 3                              
Variable Rate [4],[12] 5.50% 5.50% 5.50% 5.50% 5.50% 5.50% 5.50%                
Floor Rate [4] 0.80% 0.80% 0.80% 0.80% 0.80% 0.80% 0.80%                
Principal Amount [4],[17] $ 8.4                            
Amortized Cost [4] 8.4                            
Fair Value [3],[4] $ 8.1                            
Investment, Identifier [Axis]: Amerivet Partners Management Inc, Health Care Equipment & Services 4                              
Variable Rate [4],[12] 5.50% 5.50% 5.50% 5.50% 5.50% 5.50% 5.50%                
Floor Rate [4] 0.80% 0.80% 0.80% 0.80% 0.80% 0.80% 0.80%                
Principal Amount [4],[17] $ 50.1                            
Amortized Cost [4] 50.1                            
Fair Value [3],[4] $ 48.2                            
Investment, Identifier [Axis]: Amerivet Partners Management Inc, Preferred Stock, Health Care Equipment & Services                              
PIK Rate [12],[15] 11.50% 11.50% 11.50% 11.50% 11.50% 11.50% 11.50%                
Number of Shares | shares [15] 12,702,290 12,702,290 12,702,290 12,702,290 12,702,290 12,702,290 12,702,290                
Amortized Cost [15] $ 12.3                            
Fair Value [1],[15] $ 11.8                            
Investment, Identifier [Axis]: Amerivet Partners Management Inc, Preferred Stock, Health Care Equipment & Services | Maximum                              
PIK Rate [12],[15] 11.50% 11.50% 11.50% 11.50% 11.50% 11.50% 11.50%                
Investment, Identifier [Axis]: Ammeraal Beltech Holding BV                              
Variable Rate [24],[32],[33],[43]               7.75% 7.75% 7.75% 7.75% 7.75% 7.75% 7.75%  
Floor Rate [24],[32],[33],[43]               0.00% 0.00% 0.00% 0.00% 0.00% 0.00% 0.00%  
Principal Amount [6],[24],[32],[33],[43]               $ 44.9              
Amortized Cost [24],[32],[33],[43]               40.8              
Fair Value [2],[24],[32],[33],[43]               $ 44.3              
Investment, Identifier [Axis]: Ammeraal Beltech Holding BV, Capital Goods                              
Variable Rate [12] 7.75% 7.75% 7.75% 7.75% 7.75% 7.75% 7.75%                
Floor Rate [15],[18],[29],[34] 0.00% 0.00% 0.00% 0.00% 0.00% 0.00% 0.00%                
Principal Amount [15],[17],[18],[29],[34] $ 23.6                            
Amortized Cost [15],[18],[29],[34] 21.8                            
Fair Value [3],[15],[18],[29],[34] 23.0                            
Investment, Identifier [Axis]: Amtek Global Technology Pte Ltd                              
PIK Rate [20],[23],[24],[31],[32]               5.00% 5.00% 5.00% 5.00% 5.00% 5.00% 5.00%  
Floor Rate [20],[23],[24],[31],[32]               0.00% 0.00% 0.00% 0.00% 0.00% 0.00% 0.00%  
Principal Amount | € [6],[20],[23],[24],[31],[32]                     € 34.7        
Amortized Cost [20],[23],[24],[31],[32]               $ 39.1              
Fair Value [2],[20],[23],[24],[31],[32]               $ 0.0              
Investment, Identifier [Axis]: Amtek Global Technology Pte Ltd | Maximum                              
PIK Rate [20],[23],[24],[31],[32]               5.00% 5.00% 5.00% 5.00% 5.00% 5.00% 5.00%  
Investment, Identifier [Axis]: Amtek Global Technology Pte Ltd 1                              
PIK Rate [20],[23],[24],[31],[32]               5.00% 5.00% 5.00% 5.00% 5.00% 5.00% 5.00%  
Floor Rate [20],[23],[24],[31],[32]               0.00% 0.00% 0.00% 0.00% 0.00% 0.00% 0.00%  
Principal Amount | € [6],[20],[23],[24],[31],[32]                     € 57.2        
Amortized Cost [20],[23],[24],[31],[32]               $ 68.7              
Fair Value 3.9             $ 34.8 [2],[20],[23],[24],[31],[32]             59.7
Investment, Identifier [Axis]: Amtek Global Technology Pte Ltd 1 | Maximum                              
PIK Rate [20],[23],[24],[31],[32]               5.00% 5.00% 5.00% 5.00% 5.00% 5.00% 5.00%  
Investment, Identifier [Axis]: Amtek Global Technology Pte Ltd 2                              
Fair Value 0.0             $ 0.0             0.1
Investment, Identifier [Axis]: Amtek Global Technology Pte Ltd, Common Stock                              
Fair Value $ 0.0             $ 0.0             0.0
Investment, Identifier [Axis]: Amtek Global Technology Pte Ltd, Common Stock, Automobiles & Components                              
Number of Shares | shares 7,046,126 [15],[28],[29],[30],[44] 7,046,126 [15],[28],[29],[30],[44] 7,046,126 [15],[28],[29],[30],[44] 7,046,126 [15],[28],[29],[30],[44] 7,046,126 [15],[28],[29],[30],[44] 7,046,126 [15],[28],[29],[30],[44] 7,046,126 [15],[28],[29],[30],[44] 7,046,126 [23],[24],[31],[32],[45] 7,046,126 [23],[24],[31],[32],[45] 7,046,126 [23],[24],[31],[32],[45] 7,046,126 [23],[24],[31],[32],[45] 7,046,126 [23],[24],[31],[32],[45] 7,046,126 [23],[24],[31],[32],[45] 7,046,126 [23],[24],[31],[32],[45]  
Amortized Cost $ 0.0 [15],[28],[29],[30],[44]             $ 0.0 [23],[24],[31],[32],[45]              
Fair Value 0.0 [1],[15],[28],[29],[30],[44]             0.0 [2],[23],[24],[31],[32],[45]              
Investment, Identifier [Axis]: Amtek Global Technology Pte Ltd, Ordinary Shares                              
Fair Value $ 0.0             $ 0.0             0.0
Investment, Identifier [Axis]: Amtek Global Technology Pte Ltd, Ordinary Shares, Automobiles & Components                              
Number of Shares | shares 5,735,804,056 [15],[28],[29],[30] 5,735,804,056 [15],[28],[29],[30] 5,735,804,056 [15],[28],[29],[30] 5,735,804,056 [15],[28],[29],[30] 5,735,804,056 [15],[28],[29],[30] 5,735,804,056 [15],[28],[29],[30] 5,735,804,056 [15],[28],[29],[30] 5,735,804,056 [23],[24],[31],[32] 5,735,804,056 [23],[24],[31],[32] 5,735,804,056 [23],[24],[31],[32] 5,735,804,056 [23],[24],[31],[32] 5,735,804,056 [23],[24],[31],[32] 5,735,804,056 [23],[24],[31],[32] 5,735,804,056 [23],[24],[31],[32]  
Amortized Cost $ 30.7 [15],[28],[29],[30]             $ 30.7 [23],[24],[31],[32]              
Fair Value 0.0 [1],[15],[28],[29],[30]             0.0 [2],[23],[24],[31],[32]              
Investment, Identifier [Axis]: Amtek Global Technology Pte Ltd, Private Equity                              
Fair Value $ 0.0             $ 0.0             0.0
Investment, Identifier [Axis]: Amtek Global Technology Pte Ltd, Private Equity, Automobiles & Components                              
Number of Shares | shares 4,097 [15],[28],[29],[30] 4,097 [15],[28],[29],[30] 4,097 [15],[28],[29],[30] 4,097 [15],[28],[29],[30] 4,097 [15],[28],[29],[30] 4,097 [15],[28],[29],[30] 4,097 [15],[28],[29],[30] 4,097 [23],[24],[31],[32] 4,097 [23],[24],[31],[32] 4,097 [23],[24],[31],[32] 4,097 [23],[24],[31],[32] 4,097 [23],[24],[31],[32] 4,097 [23],[24],[31],[32] 4,097 [23],[24],[31],[32]  
Amortized Cost $ 0.0 [15],[28],[29],[30]             $ 0.0 [23],[24],[31],[32]              
Fair Value $ 0.0 [1],[15],[28],[29],[30]             0.0 [2],[23],[24],[31],[32]              
Investment, Identifier [Axis]: Amtek Global Technology Pte Ltd, Trade Claim                              
Fair Value               $ 0.0             0.0
Investment, Identifier [Axis]: Angelica Corp                              
PIK Rate [20],[23],[46]               10.00% 10.00% 10.00% 10.00% 10.00% 10.00% 10.00%  
Principal Amount [6],[20],[23],[46]               $ 53.4              
Amortized Cost [20],[23],[46]               42.3              
Fair Value [2],[20],[23],[46]               $ 5.2              
Investment, Identifier [Axis]: Angelica Corp | Maximum                              
PIK Rate [20],[23],[46]               10.00% 10.00% 10.00% 10.00% 10.00% 10.00% 10.00%  
Investment, Identifier [Axis]: Angelica Corp, Health Care Equipment & Services                              
PIK Rate [12] 10.00% 10.00% 10.00% 10.00% 10.00% 10.00% 10.00%                
Principal Amount [17],[25],[28],[47] $ 59.0                            
Amortized Cost [25],[28],[47] 42.3                            
Fair Value [3],[25],[28],[47] $ 0.9                            
Investment, Identifier [Axis]: Angelica Corp, Health Care Equipment & Services | Maximum                              
PIK Rate [12] 10.00% 10.00% 10.00% 10.00% 10.00% 10.00% 10.00%                
Investment, Identifier [Axis]: Angelica Corp, Limited Partnership Interest, Health Care Equipment & Services                              
Number of Shares | shares 877,044 [28],[47] 877,044 [28],[47] 877,044 [28],[47] 877,044 [28],[47] 877,044 [28],[47] 877,044 [28],[47] 877,044 [28],[47] 877,044 [23],[46] 877,044 [23],[46] 877,044 [23],[46] 877,044 [23],[46] 877,044 [23],[46] 877,044 [23],[46] 877,044 [23],[46]  
Amortized Cost $ 47.6 [28],[47]             $ 47.6 [23],[46]              
Fair Value $ 0.0 [1],[28],[47]             $ 0.0 [2],[23],[46]              
Investment, Identifier [Axis]: Apex Group Limited                              
Variable Rate [24],[32]               6.75% 6.75% 6.75% 6.75% 6.75% 6.75% 6.75%  
Floor Rate [24],[32]               0.50% 0.50% 0.50% 0.50% 0.50% 0.50% 0.50%  
Principal Amount [6],[24],[32]               $ 8.0              
Amortized Cost [24],[32]               7.9              
Fair Value [2],[24],[32]               $ 8.0              
Investment, Identifier [Axis]: Apex Group Limited, Diversified Financials 1                              
Variable Rate [12],[15],[29],[37] 3.75% 3.75% 3.75% 3.75% 3.75% 3.75% 3.75%                
Floor Rate [15],[29],[37] 0.50% 0.50% 0.50% 0.50% 0.50% 0.50% 0.50%                
Principal Amount [15],[17],[29],[37] $ 2.5                            
Amortized Cost [15],[29],[37] 2.5                            
Fair Value [3],[15],[29],[37] $ 2.4                            
Investment, Identifier [Axis]: Apex Group Limited, Diversified Financials 2                              
Variable Rate [12],[15],[29],[37] 4.00% 4.00% 4.00% 4.00% 4.00% 4.00% 4.00%                
Floor Rate [15],[29],[37] 0.00% 0.00% 0.00% 0.00% 0.00% 0.00% 0.00%                
Principal Amount | € [15],[17],[29],[37]       € 2.0                      
Amortized Cost [15],[29],[37] $ 2.3                            
Fair Value [3],[15],[29],[37] $ 2.0                            
Investment, Identifier [Axis]: Apex Group Limited, Diversified Financials 3                              
Variable Rate [12] 6.75% 6.75% 6.75% 6.75% 6.75% 6.75% 6.75%                
Floor Rate [15],[29] 0.50% 0.50% 0.50% 0.50% 0.50% 0.50% 0.50%                
Principal Amount [15],[17],[29] $ 55.0                            
Amortized Cost [15],[29] 54.0                            
Fair Value [3],[15],[29] $ 51.7                            
Investment, Identifier [Axis]: Arcfield Acquisition Corp, Capital Goods 1                              
Variable Rate [12],[15],[16] 5.75% 5.75% 5.75% 5.75% 5.75% 5.75% 5.75%                
Floor Rate [16],[19] 0.80% 0.80% 0.80% 0.80% 0.80% 0.80% 0.80%                
Principal Amount [16],[17],[19] $ 40.3                            
Amortized Cost [16],[19] 39.9                            
Fair Value [3],[16],[19] $ 39.4                            
Investment, Identifier [Axis]: Arcfield Acquisition Corp, Capital Goods 2                              
Variable Rate [4],[12] 5.75% 5.75% 5.75% 5.75% 5.75% 5.75% 5.75%                
Floor Rate [4] 0.80% 0.80% 0.80% 0.80% 0.80% 0.80% 0.80%                
Principal Amount [4],[17] $ 7.1                            
Amortized Cost [4] 7.1                            
Fair Value [3],[4] $ 6.9                            
Investment, Identifier [Axis]: Arcos LLC/VA, Preferred Stock, Software & Services                              
PIK Rate 9.50% [12],[15] 9.50% [12],[15] 9.50% [12],[15] 9.50% [12],[15] 9.50% [12],[15] 9.50% [12],[15] 9.50% [12],[15] 9.50% [7],[32] 9.50% [7],[32] 9.50% [7],[32] 9.50% [7],[32] 9.50% [7],[32] 9.50% [7],[32] 9.50% [7],[32]  
Floor Rate 1.00% [15] 1.00% [15] 1.00% [15] 1.00% [15] 1.00% [15] 1.00% [15] 1.00% [15] 1.00% [32] 1.00% [32] 1.00% [32] 1.00% [32] 1.00% [32] 1.00% [32] 1.00% [32]  
Number of Shares | shares 15,000,000 [15] 15,000,000 [15] 15,000,000 [15] 15,000,000 [15] 15,000,000 [15] 15,000,000 [15] 15,000,000 [15] 15,000,000 [32] 15,000,000 [32] 15,000,000 [32] 15,000,000 [32] 15,000,000 [32] 15,000,000 [32] 15,000,000 [32]  
Amortized Cost $ 14.0 [15]             $ 14.0 [32]              
Fair Value $ 13.4 [1],[15]             $ 15.5 [2],[32]              
Investment, Identifier [Axis]: Arcos LLC/VA, Preferred Stock, Software & Services | Maximum                              
PIK Rate 9.50% [12],[15] 9.50% [12],[15] 9.50% [12],[15] 9.50% [12],[15] 9.50% [12],[15] 9.50% [12],[15] 9.50% [12],[15] 9.50% [7],[32] 9.50% [7],[32] 9.50% [7],[32] 9.50% [7],[32] 9.50% [7],[32] 9.50% [7],[32] 9.50% [7],[32]  
Investment, Identifier [Axis]: Arcos LLC/VA, Senior Secured Loans—First Lien, Software & Services, Maturing April 20, 2027                              
Variable Rate [5]               5.75% 5.75% 5.75% 5.75% 5.75% 5.75% 5.75%  
Floor Rate [5]               1.00% 1.00% 1.00% 1.00% 1.00% 1.00% 1.00%  
Principal Amount [5],[6]               $ 4.5              
Amortized Cost [5]               4.5              
Fair Value [2],[5]               $ 4.5              
Investment, Identifier [Axis]: Arcos LLC/VA, Senior Secured Loans—First Lien, Software & Services, Maturing March 31, 2028                              
Variable Rate [39]               5.75% 5.75% 5.75% 5.75% 5.75% 5.75% 5.75%  
Floor Rate [39]               1.00% 1.00% 1.00% 1.00% 1.00% 1.00% 1.00%  
Principal Amount [6],[39]               $ 12.5              
Amortized Cost [39]               12.3              
Fair Value [2],[39]               $ 12.4              
Investment, Identifier [Axis]: Arcos LLC/VA, Software & Services 1                              
Variable Rate [12],[40] 5.75% 5.75% 5.75% 5.75% 5.75% 5.75% 5.75%                
Floor Rate [40] 1.00% 1.00% 1.00% 1.00% 1.00% 1.00% 1.00%                
Principal Amount [17],[40] $ 12.3                            
Amortized Cost [40] 12.2                            
Fair Value [3],[40] $ 11.4                            
Investment, Identifier [Axis]: Arcos LLC/VA, Software & Services 2                              
Variable Rate [4],[12] 5.75% 5.75% 5.75% 5.75% 5.75% 5.75% 5.75%                
Floor Rate [4] 1.00% 1.00% 1.00% 1.00% 1.00% 1.00% 1.00%                
Principal Amount [4],[17] $ 4.5                            
Amortized Cost [4] 4.5                            
Fair Value [3],[4] $ 4.2                            
Investment, Identifier [Axis]: Ardonagh Group Ltd                              
PIK Rate [24],[32],[36]               12.80% 12.80% 12.80% 12.80% 12.80% 12.80% 12.80%  
Principal Amount [6],[24],[32],[36]               $ 0.9              
Amortized Cost [24],[32],[36]               0.9              
Fair Value [2],[24],[32],[36]               $ 1.0              
Investment, Identifier [Axis]: Ardonagh Group Ltd | Maximum                              
PIK Rate [24],[32],[36]               12.80% 12.80% 12.80% 12.80% 12.80% 12.80% 12.80%  
Investment, Identifier [Axis]: Ardonagh Group Ltd, Insurance 1                              
Variable Rate [12],[15],[29] 7.00% 7.00% 7.00% 7.00% 7.00% 7.00% 7.00%                
Floor Rate [15],[29] 0.80% 0.80% 0.80% 0.80% 0.80% 0.80% 0.80%                
Principal Amount | £ [15],[17],[29]         £ 0.8                    
Amortized Cost [15],[29] $ 1.0                            
Fair Value [3],[15],[29] $ 0.9                            
Investment, Identifier [Axis]: Ardonagh Group Ltd, Insurance 2                              
Variable Rate [4],[12],[29] 7.00% 7.00% 7.00% 7.00% 7.00% 7.00% 7.00%                
Floor Rate [15],[29] 1.00% 1.00% 1.00% 1.00% 1.00% 1.00% 1.00%                
Principal Amount | € [15],[17],[29]       € 19.0                      
Amortized Cost [15],[29] $ 19.3                            
Fair Value [3],[15],[29] $ 20.2                            
Investment, Identifier [Axis]: Ardonagh Group Ltd, Insurance 3                              
Rate [12] 11.50% 11.50% 11.50% 11.50% 11.50% 11.50% 11.50%                
PIK Rate [12] 0.00% 0.00% 0.00% 0.00% 0.00% 0.00% 0.00%                
Principal Amount [15],[17],[29],[37] $ 1.0                            
Amortized Cost [15],[29],[37] 1.0                            
Fair Value [3],[15],[29],[37] $ 0.9                            
Investment, Identifier [Axis]: Ardonagh Group Ltd, Insurance 3 | Maximum                              
PIK Rate [12] 12.80% 12.80% 12.80% 12.80% 12.80% 12.80% 12.80%                
Investment, Identifier [Axis]: Ardonagh Group Ltd, Senior Secured Loans—First Lien, Insurance, Maturing July 14, 2026 - 3                              
Variable Rate [5],[24]               5.50% 5.50% 5.50% 5.50% 5.50% 5.50% 5.50%  
Floor Rate [5],[24]               1.00% 1.00% 1.00% 1.00% 1.00% 1.00% 1.00%  
Principal Amount | £ [5],[6],[24]                       £ 16.7      
Amortized Cost [5],[24]               $ 22.8              
Fair Value [2],[5],[24]               $ 22.1              
Investment, Identifier [Axis]: Ardonagh Group Ltd, Senior Secured Loans—First Lien, Insurance, Maturing July 14, 2026 -1                              
Variable Rate [24],[32]               6.75% 6.75% 6.75% 6.75% 6.75% 6.75% 6.75%  
Floor Rate [24],[32]               0.80% 0.80% 0.80% 0.80% 0.80% 0.80% 0.80%  
Principal Amount | £ [6],[24],[32]                       £ 0.8      
Amortized Cost [24],[32]               $ 1.0              
Fair Value [2],[24],[32]               $ 1.1              
Investment, Identifier [Axis]: Ardonagh Group Ltd, Senior Secured Loans—First Lien, Insurance, Maturing July 14, 2026 -2                              
Variable Rate [24],[32]               5.50% 5.50% 5.50% 5.50% 5.50% 5.50% 5.50%  
Floor Rate [24],[32]               0.80% 0.80% 0.80% 0.80% 0.80% 0.80% 0.80%  
Principal Amount [6],[24],[32]               $ 14.1              
Amortized Cost [24],[32]               13.8              
Fair Value [2],[24],[32]               $ 13.9              
Investment, Identifier [Axis]: Ardonagh Ltd, Ordinary Shares, Insurance 1                              
Number of Shares | shares [23],[24],[32]               16,450 16,450 16,450 16,450 16,450 16,450 16,450  
Amortized Cost [23],[24],[32]               $ 0.0              
Fair Value [2],[23],[24],[32]               $ 2.8              
Investment, Identifier [Axis]: Ardonagh Ltd, Ordinary Shares, Insurance 2                              
Number of Shares | shares [23],[24],[32]               116,814 116,814 116,814 116,814 116,814 116,814 116,814  
Amortized Cost [23],[24],[32]               $ 0.2              
Fair Value [2],[23],[24],[32]               $ 0.5              
Investment, Identifier [Axis]: Ardonagh Ltd, Preferred Stock, Insurance                              
Number of Shares | shares [23],[24],[32]               6,113,719 6,113,719 6,113,719 6,113,719 6,113,719 6,113,719 6,113,719  
Amortized Cost [23],[24],[32]               $ 9.1              
Fair Value [2],[23],[24],[32]               $ 22.0              
Investment, Identifier [Axis]: Arena Energy LP, Warrants, Energy                              
Number of Shares | shares 68,186,525 [15] 68,186,525 [15] 68,186,525 [15] 68,186,525 [15] 68,186,525 [15] 68,186,525 [15] 68,186,525 [15] 68,186,525 [23],[32] 68,186,525 [23],[32] 68,186,525 [23],[32] 68,186,525 [23],[32] 68,186,525 [23],[32] 68,186,525 [23],[32] 68,186,525 [23],[32]  
Amortized Cost $ 0.4 [15]             $ 0.4 [23],[32]              
Fair Value $ 0.5 [1],[15]             $ 0.6 [2],[23],[32]              
Investment, Identifier [Axis]: Arrotex Australia Group Pty Ltd, Senior Secured Loans—First Lien, Pharmaceuticals, Biotechnology & Life Sciences, July 10, 2024 -1                              
Variable Rate [24],[32]               5.25% 5.25% 5.25% 5.25% 5.25% 5.25% 5.25%  
Floor Rate [24],[32]               1.00% 1.00% 1.00% 1.00% 1.00% 1.00% 1.00%  
Principal Amount [6],[24],[32]                         $ 42.6    
Amortized Cost [24],[32]               $ 30.4              
Fair Value [2],[24],[32]               $ 30.9              
Investment, Identifier [Axis]: Arrotex Australia Group Pty Ltd, Senior Secured Loans—First Lien, Pharmaceuticals, Biotechnology & Life Sciences, July 10, 2024 -2                              
Variable Rate [24],[32]               5.25% 5.25% 5.25% 5.25% 5.25% 5.25% 5.25%  
Floor Rate [24],[32]               1.00% 1.00% 1.00% 1.00% 1.00% 1.00% 1.00%  
Principal Amount [6],[24],[32]                         $ 3.1    
Amortized Cost [24],[32]               $ 2.2              
Fair Value [2],[24],[32]               $ 2.3              
Investment, Identifier [Axis]: Arrotex Australia Group Pty Ltd, Pharmaceuticals, Biotechnology & Life Sciences 1                              
Variable Rate [12],[15],[29] 5.25% 5.25% 5.25% 5.25% 5.25% 5.25% 5.25%                
Floor Rate [15],[29] 1.00% 1.00% 1.00% 1.00% 1.00% 1.00% 1.00%                
Principal Amount [15],[17],[29]           $ 42.6                  
Amortized Cost [15],[29] $ 31.1                            
Fair Value [3],[15],[29] $ 29.0                            
Investment, Identifier [Axis]: Arrotex Australia Group Pty Ltd, Pharmaceuticals, Biotechnology & Life Sciences 2                              
Variable Rate [12],[15],[29] 5.25% 5.25% 5.25% 5.25% 5.25% 5.25% 5.25%                
Floor Rate [15],[29] 1.00% 1.00% 1.00% 1.00% 1.00% 1.00% 1.00%                
Principal Amount [15],[17],[29]           $ 3.1                  
Amortized Cost [15],[29] $ 2.2                            
Fair Value [3],[15],[29] $ 2.1                            
Investment, Identifier [Axis]: Ascent Resources Utica Holdings LLC / ARU Finance Corp, Common Stock, Energy                              
Number of Shares | shares 10,193 [28],[48] 10,193 [28],[48] 10,193 [28],[48] 10,193 [28],[48] 10,193 [28],[48] 10,193 [28],[48] 10,193 [28],[48] 10,193 [23],[49] 10,193 [23],[49] 10,193 [23],[49] 10,193 [23],[49] 10,193 [23],[49] 10,193 [23],[49] 10,193 [23],[49]  
Amortized Cost $ 9.7 [28],[48]             $ 9.7 [23],[49]              
Fair Value $ 3.6 [1],[28],[48]             $ 2.3 [2],[23],[49]              
Investment, Identifier [Axis]: Ascent Resources Utica Holdings LLC / ARU Finance Corp, Trade Claim, Energy                              
Number of Shares | shares 86,607,143 [28],[48] 86,607,143 [28],[48] 86,607,143 [28],[48] 86,607,143 [28],[48] 86,607,143 [28],[48] 86,607,143 [28],[48] 86,607,143 [28],[48] 86,607,143 [23],[49] 86,607,143 [23],[49] 86,607,143 [23],[49] 86,607,143 [23],[49] 86,607,143 [23],[49] 86,607,143 [23],[49] 86,607,143 [23],[49]  
Amortized Cost $ 19.4 [28],[48]             $ 19.4 [23],[49]              
Fair Value $ 30.5 [1],[28],[48]             $ 19.8 [2],[23],[49]              
Investment, Identifier [Axis]: Aspect Software Inc                              
PIK Rate [32]               8.00% 8.00% 8.00% 8.00% 8.00% 8.00% 8.00%  
Principal Amount [6],[32]               $ 0.3              
Amortized Cost [32]               0.2              
Fair Value [2],[32]               $ 0.3              
Investment, Identifier [Axis]: Aspect Software Inc | Maximum                              
PIK Rate [32]               8.00% 8.00% 8.00% 8.00% 8.00% 8.00% 8.00%  
Investment, Identifier [Axis]: Aspect Software Inc, Common Stock, Software & Services                              
Number of Shares | shares [9],[23],[32],[33]               1,309,955 1,309,955 1,309,955 1,309,955 1,309,955 1,309,955 1,309,955  
Amortized Cost [9],[23],[32],[33]               $ 2.3              
Fair Value [2],[9],[23],[32],[33]               $ 2.7              
Investment, Identifier [Axis]: Aspect Software Inc, Warrant, Software & Services                              
Number of Shares | shares [9],[23],[32],[33]               181,730 181,730 181,730 181,730 181,730 181,730 181,730  
Amortized Cost [9],[23],[32],[33]               $ 0.3              
Fair Value [2],[9],[23],[32],[33]               $ 0.3              
Investment, Identifier [Axis]: Australis Maritime, Common Stock, Transportation                              
Number of Shares | shares 48,936,056 [15],[29] 48,936,056 [15],[29] 48,936,056 [15],[29] 48,936,056 [15],[29] 48,936,056 [15],[29] 48,936,056 [15],[29] 48,936,056 [15],[29] 46,781,830 [6],[24],[32] 46,781,830 [6],[24],[32] 46,781,830 [6],[24],[32] 46,781,830 [6],[24],[32] 46,781,830 [6],[24],[32] 46,781,830 [6],[24],[32] 46,781,830 [6],[24],[32]  
Amortized Cost $ 47.6 [15],[29]             $ 45.1 [24],[32]              
Fair Value 49.3 [3],[15],[29]             46.7 [2],[24],[32]              
Investment, Identifier [Axis]: Avenue One PropCo, Private Equity                              
Fair Value $ 31.0             0.0              
Investment, Identifier [Axis]: Avenue One PropCo, Private Equity, Real Estate                              
Number of Shares | shares [15],[28],[29],[30] 30,064,353 30,064,353 30,064,353 30,064,353 30,064,353 30,064,353 30,064,353                
Amortized Cost [15],[28],[29],[30] $ 30.1                            
Fair Value [3],[15],[28],[29],[30] 31.0                            
Investment, Identifier [Axis]: Avida Holding AB, Common Stock                              
Fair Value $ 42.6             $ 52.3             38.3
Investment, Identifier [Axis]: Avida Holding AB, Common Stock, Diversified Financials                              
Number of Shares | shares 405,023,756 [15],[28],[29],[30] 405,023,756 [15],[28],[29],[30] 405,023,756 [15],[28],[29],[30] 405,023,756 [15],[28],[29],[30] 405,023,756 [15],[28],[29],[30] 405,023,756 [15],[28],[29],[30] 405,023,756 [15],[28],[29],[30] 405,023,756 [6],[23],[24],[31],[32] 405,023,756 [6],[23],[24],[31],[32] 405,023,756 [6],[23],[24],[31],[32] 405,023,756 [6],[23],[24],[31],[32] 405,023,756 [6],[23],[24],[31],[32] 405,023,756 [6],[23],[24],[31],[32] 405,023,756 [6],[23],[24],[31],[32]  
Amortized Cost $ 44.6 [15],[28],[29],[30]             $ 44.6 [23],[24],[31],[32]              
Fair Value $ 42.6 [3],[15],[28],[29],[30]             $ 52.3 [2],[23],[24],[31],[32]              
Investment, Identifier [Axis]: AxiomSL Ltd, Senior Secured Loans—First Lien, Software & Services, Maturing December 3, 2025                              
Variable Rate [5]               6.00% 6.00% 6.00% 6.00% 6.00% 6.00% 6.00%  
Floor Rate [5]               1.00% 1.00% 1.00% 1.00% 1.00% 1.00% 1.00%  
Principal Amount [5],[6]               $ 2.5              
Amortized Cost [5]               2.4              
Fair Value [2],[5]               $ 2.4              
Investment, Identifier [Axis]: AxiomSL Ltd, Senior Secured Loans—First Lien, Software & Services, Maturing December 3, 2027 -1                              
Variable Rate [32],[38],[39],[43]               6.00% 6.00% 6.00% 6.00% 6.00% 6.00% 6.00%  
Floor Rate [32],[38],[39],[43]               1.00% 1.00% 1.00% 1.00% 1.00% 1.00% 1.00%  
Principal Amount [6],[32],[38],[39],[43]               $ 35.1              
Amortized Cost [32],[38],[39],[43]               34.4              
Fair Value [2],[32],[38],[39],[43]               $ 34.4              
Investment, Identifier [Axis]: AxiomSL Ltd, Senior Secured Loans—First Lien, Software & Services, Maturing December 3, 2027- 2                              
Variable Rate [5]               6.00% 6.00% 6.00% 6.00% 6.00% 6.00% 6.00%  
Floor Rate [5]               1.00% 1.00% 1.00% 1.00% 1.00% 1.00% 1.00%  
Principal Amount [5],[6]               $ 2.3              
Amortized Cost [5]               2.3              
Fair Value [2],[5]               $ 2.2              
Investment, Identifier [Axis]: AxiomSL Ltd, Software & Services 1                              
Variable Rate [12],[15],[18],[19],[40] 6.00% 6.00% 6.00% 6.00% 6.00% 6.00% 6.00%                
Floor Rate [15],[18],[19],[40] 1.00% 1.00% 1.00% 1.00% 1.00% 1.00% 1.00%                
Principal Amount [15],[17],[18],[19],[40] $ 34.7                            
Amortized Cost [15],[18],[19],[40] 34.1                            
Fair Value [3],[15],[18],[19],[40] $ 33.7                            
Investment, Identifier [Axis]: AxiomSL Ltd, Software & Services 2                              
Variable Rate [4],[12] 6.00% 6.00% 6.00% 6.00% 6.00% 6.00% 6.00%                
Floor Rate [4] 1.00% 1.00% 1.00% 1.00% 1.00% 1.00% 1.00%                
Principal Amount [4],[17] $ 2.5                            
Amortized Cost [4] 2.4                            
Fair Value [3],[4] $ 2.4                            
Investment, Identifier [Axis]: AxiomSL Ltd, Software & Services 3                              
Variable Rate [4],[12] 6.00% 6.00% 6.00% 6.00% 6.00% 6.00% 6.00%                
Floor Rate [4] 1.00% 1.00% 1.00% 1.00% 1.00% 1.00% 1.00%                
Principal Amount [4],[17] $ 2.3                            
Amortized Cost [4] 2.3                            
Fair Value [3],[4] $ 2.2                            
Investment, Identifier [Axis]: BGB Group LLC, Media & Entertainment 1                              
Variable Rate [12],[13],[14],[16],[18],[19],[40] 5.75% 5.75% 5.75% 5.75% 5.75% 5.75% 5.75%                
Floor Rate [13],[14],[16],[18],[19],[40] 1.00% 1.00% 1.00% 1.00% 1.00% 1.00% 1.00%                
Principal Amount [13],[14],[16],[17],[18],[19],[40] $ 111.1                            
Amortized Cost [13],[14],[16],[18],[19],[40] 110.3                            
Fair Value [3],[13],[14],[16],[18],[19],[40] $ 108.4                            
Investment, Identifier [Axis]: BGB Group LLC, Media & Entertainment 2                              
Variable Rate [4],[12] 5.75% 5.75% 5.75% 5.75% 5.75% 5.75% 5.75%                
Floor Rate [4] 1.00% 1.00% 1.00% 1.00% 1.00% 1.00% 1.00%                
Principal Amount [4],[17] $ 19.9                            
Amortized Cost [4] 19.9                            
Fair Value [3],[4] $ 19.5                            
Investment, Identifier [Axis]: BGB Group LLC, Senior Secured Loans—First Lien, Media & Entertainment -1                              
Variable Rate [8],[9],[10],[32],[38],[39],[43]               5.75% 5.75% 5.75% 5.75% 5.75% 5.75% 5.75%  
Floor Rate [8],[9],[10],[32],[38],[39],[43]               1.00% 1.00% 1.00% 1.00% 1.00% 1.00% 1.00%  
Principal Amount [6],[8],[9],[10],[32],[38],[39],[43]               $ 118.6              
Amortized Cost [8],[9],[10],[32],[38],[39],[43]               117.5              
Fair Value [2],[8],[9],[10],[32],[38],[39],[43]               $ 118.0              
Investment, Identifier [Axis]: BGB Group LLC, Senior Secured Loans—First Lien, Media & Entertainment -2                              
Variable Rate [5]               5.75% 5.75% 5.75% 5.75% 5.75% 5.75% 5.75%  
Floor Rate [5]               1.00% 1.00% 1.00% 1.00% 1.00% 1.00% 1.00%  
Principal Amount [5],[6]               $ 19.9              
Amortized Cost [5]               19.9              
Fair Value [2],[5]               $ 19.8              
Investment, Identifier [Axis]: Bank of Ireland, Class B Credit Linked Floating Rate Note, Banks                              
Variable Rate [7],[24],[45]               11.85% 11.85% 11.85% 11.85% 11.85% 11.85% 11.85%  
Principal Amount [6],[24],[45]               $ 14.7              
Amortized Cost [24],[45]               14.7              
Fair Value [2],[24],[45]               $ 14.7              
Investment, Identifier [Axis]: Bankers Healthcare Group LLC, Term Loan, Diversified Financials                              
Variable Rate [12],[15],[29] 3.93% 3.93% 3.93% 3.93% 3.93% 3.93% 3.93%                
Floor Rate [15],[29] 0.00% 0.00% 0.00% 0.00% 0.00% 0.00% 0.00%                
Principal Amount [15],[17],[29] $ 11.3                            
Amortized Cost [15],[29] 11.3                            
Fair Value [3],[15],[29] $ 11.3                            
Investment, Identifier [Axis]: Barbri Inc, Consumer Services 1                              
Variable Rate [12],[13],[14],[18],[19],[40] 5.75% 5.75% 5.75% 5.75% 5.75% 5.75% 5.75%                
Floor Rate [13],[14],[18],[19],[40] 0.80% 0.80% 0.80% 0.80% 0.80% 0.80% 0.80%                
Principal Amount [13],[14],[17],[18],[19],[40] $ 61.5                            
Amortized Cost [13],[14],[18],[19],[40] 57.7                            
Fair Value [3],[13],[14],[18],[19],[40] $ 61.0                            
Investment, Identifier [Axis]: Barbri Inc, Consumer Services 2                              
Variable Rate [4],[12] 5.75% 5.75% 5.75% 5.75% 5.75% 5.75% 5.75%                
Floor Rate [13],[14],[15] 0.80% 0.80% 0.80% 0.80% 0.80% 0.80% 0.80%                
Principal Amount [13],[14],[15],[17] $ 70.3                            
Amortized Cost [13],[14],[15] 70.0                            
Fair Value [3],[13],[14],[15] $ 69.7                            
Investment, Identifier [Axis]: Barbri Inc, Consumer Services 3                              
Variable Rate [12] 5.75% 5.75% 5.75% 5.75% 5.75% 5.75% 5.75%                
Floor Rate [4] 0.80% 0.80% 0.80% 0.80% 0.80% 0.80% 0.80%                
Principal Amount [4],[17] $ 9.1                            
Amortized Cost [4] 9.1                            
Fair Value [3],[4] 9.1                            
Investment, Identifier [Axis]: Barbri Inc, Senior Secured Loans—First Lien, Consumer Services, Maturing April 28, 2028                              
Variable Rate [8],[9],[32],[38],[39],[43]               5.75% 5.75% 5.75% 5.75% 5.75% 5.75% 5.75%  
Floor Rate [8],[9],[32],[38],[39],[43]               0.80% 0.80% 0.80% 0.80% 0.80% 0.80% 0.80%  
Principal Amount [6],[8],[9],[32],[38],[39],[43]               $ 92.4              
Amortized Cost [8],[9],[32],[38],[39],[43]               88.1              
Fair Value [2],[8],[9],[32],[38],[39],[43]               $ 92.4              
Investment, Identifier [Axis]: Barbri Inc, Senior Secured Loans—First Lien, Consumer Services, Maturing April 30, 2028 - 1                              
Floor Rate [8],[9]               0.80% 0.80% 0.80% 0.80% 0.80% 0.80% 0.80%  
Principal Amount [6],[8],[9]               $ 35.1              
Amortized Cost [8],[9]               34.8              
Fair Value [2],[8],[9]               $ 34.8              
Investment, Identifier [Axis]: Barbri Inc, Senior Secured Loans—First Lien, Consumer Services, Maturing April 30, 2028 -2                              
Variable Rate [5]               5.75% 5.75% 5.75% 5.75% 5.75% 5.75% 5.75%  
Floor Rate [5]               0.80% 0.80% 0.80% 0.80% 0.80% 0.80% 0.80%  
Principal Amount [5],[6]               $ 14.8              
Amortized Cost [5]               14.8              
Fair Value [2],[5]               $ 14.6              
Investment, Identifier [Axis]: Belk Inc                              
PIK Rate [20],[23],[32],[42]               10.00% 10.00% 10.00% 10.00% 10.00% 10.00% 10.00%  
Principal Amount [6],[20],[23],[32],[42]               $ 25.5              
Amortized Cost [20],[23],[32],[42]               4.2              
Fair Value               $ 6.7 [2],[20],[23],[32],[42]             0.0
Investment, Identifier [Axis]: Belk Inc | Maximum                              
PIK Rate [20],[23],[32],[42]               10.00% 10.00% 10.00% 10.00% 10.00% 10.00% 10.00%  
Investment, Identifier [Axis]: Belk Inc 1                              
Fair Value 8.8             $ 49.2             0.0
Investment, Identifier [Axis]: Belk Inc 2                              
Fair Value 19.4             21.9             0.0
Investment, Identifier [Axis]: Belk Inc 3                              
Fair Value 3.3             6.7              
Investment, Identifier [Axis]: Belk Inc, Common Stock                              
Fair Value $ 0.0             $ 0.0             0.0
Investment, Identifier [Axis]: Belk Inc, Common Stock, Retailing                              
Number of Shares | shares 94,950 [15],[28],[41] 94,950 [15],[28],[41] 94,950 [15],[28],[41] 94,950 [15],[28],[41] 94,950 [15],[28],[41] 94,950 [15],[28],[41] 94,950 [15],[28],[41] 94,950 [23],[42],[46],[50] 94,950 [23],[42],[46],[50] 94,950 [23],[42],[46],[50] 94,950 [23],[42],[46],[50] 94,950 [23],[42],[46],[50] 94,950 [23],[42],[46],[50] 94,950 [23],[42],[46],[50]  
Amortized Cost $ 0.0 [15],[28],[41]             $ 0.0 [23],[42],[46],[50]              
Fair Value $ 0.0 [1],[15],[28],[41]             $ 0.0 [2],[23],[42],[46],[50]              
Investment, Identifier [Axis]: Belk Inc, Retailing 1                              
Variable Rate [12],[15],[37],[41] 7.50% 7.50% 7.50% 7.50% 7.50% 7.50% 7.50%                
Floor Rate [15],[37],[41] 1.00% 1.00% 1.00% 1.00% 1.00% 1.00% 1.00%                
Principal Amount [15],[17],[37],[41] $ 21.9                            
Amortized Cost [15],[37],[41] 21.8                            
Fair Value [3],[15],[37],[41] $ 19.4                            
Investment, Identifier [Axis]: Belk Inc, Retailing 2                              
Variable Rate [12],[15],[25],[28],[37],[41] 5.00% 5.00% 5.00% 5.00% 5.00% 5.00% 5.00%                
PIK Rate [12],[15],[25],[28],[37],[41] 8.00% 8.00% 8.00% 8.00% 8.00% 8.00% 8.00%                
Principal Amount [15],[17],[25],[28],[37],[41] $ 71.0                            
Amortized Cost [15],[25],[28],[37],[41] 42.5                            
Fair Value [3],[15],[25],[28],[37],[41] $ 8.8                            
Investment, Identifier [Axis]: Belk Inc, Retailing 2 | Maximum                              
PIK Rate [12],[15],[25],[28],[37],[41] 8.00% 8.00% 8.00% 8.00% 8.00% 8.00% 8.00%                
Investment, Identifier [Axis]: Belk Inc, Retailing 3                              
PIK Rate [12] 10.00% 10.00% 10.00% 10.00% 10.00% 10.00% 10.00%                
Principal Amount [15],[17],[25],[28],[41] $ 28.2                            
Amortized Cost [15],[25],[28],[41] 4.2                            
Fair Value [3],[15],[25],[28],[41] $ 3.3                            
Investment, Identifier [Axis]: Belk Inc, Retailing 3 | Maximum                              
PIK Rate [12] 10.00% 10.00% 10.00% 10.00% 10.00% 10.00% 10.00%                
Investment, Identifier [Axis]: Belk Inc, Senior Secured Loans—First Lien, Retailing, Maturing July 31, 2025 -1                              
Variable Rate [32],[36],[42]               7.50% 7.50% 7.50% 7.50% 7.50% 7.50% 7.50%  
Floor Rate [32],[36],[42]               1.00% 1.00% 1.00% 1.00% 1.00% 1.00% 1.00%  
Principal Amount [6],[32],[36],[42]               $ 21.9              
Amortized Cost [32],[36],[42]               21.7              
Fair Value [2],[32],[36],[42]               $ 21.9              
Investment, Identifier [Axis]: Belk Inc, Senior Secured Loans—First Lien, Retailing, Maturing July 31, 2025 -2                              
Variable Rate [32],[36],[42]               5.00% 5.00% 5.00% 5.00% 5.00% 5.00% 5.00%  
PIK Rate [32],[36],[42]               8.00% 8.00% 8.00% 8.00% 8.00% 8.00% 8.00%  
Principal Amount [6],[32],[36],[42]               $ 66.7              
Amortized Cost [32],[36],[42]               40.2              
Fair Value [2],[32],[36],[42]               $ 49.2              
Investment, Identifier [Axis]: Belk Inc, Senior Secured Loans—First Lien, Retailing, Maturing July 31, 2025 -2 | Maximum                              
PIK Rate [32],[36],[42]               8.00% 8.00% 8.00% 8.00% 8.00% 8.00% 8.00%  
Investment, Identifier [Axis]: Borden (New Dairy Opco) 1                              
Variable Rate [32],[42]               7.00% 7.00% 7.00% 7.00% 7.00% 7.00% 7.00%  
PIK Rate [32],[42]               0.00% 0.00% 0.00% 0.00% 0.00% 0.00% 0.00%  
Floor Rate [32],[42]               1.00% 1.00% 1.00% 1.00% 1.00% 1.00% 1.00%  
Principal Amount [6],[32],[42]               $ 42.0              
Amortized Cost [32],[42]               40.2              
Fair Value $ 0.0             $ 42.0 [2],[32],[42]              
Investment, Identifier [Axis]: Borden (New Dairy Opco) 1 | Maximum                              
PIK Rate [32],[42]               1.00% 1.00% 1.00% 1.00% 1.00% 1.00% 1.00%  
Investment, Identifier [Axis]: Borden (New Dairy Opco) 2                              
Variable Rate [32],[42]               2.50% 2.50% 2.50% 2.50% 2.50% 2.50% 2.50%  
Floor Rate [32],[42]               1.00% 1.00% 1.00% 1.00% 1.00% 1.00% 1.00%  
Principal Amount [6],[32],[42]               $ 9.0              
Amortized Cost [32],[42]               8.4              
Fair Value 0.0             9.0 [2],[32],[42]              
Investment, Identifier [Axis]: Borden (New Dairy Opco) 3                              
Fair Value               9.0             7.6
Investment, Identifier [Axis]: Borden (New Dairy Opco) 4                              
Fair Value               42.0             16.8
Investment, Identifier [Axis]: Borden (New Dairy Opco), Common Stock                              
Fair Value $ 4.8             $ 7.7             3.2
Investment, Identifier [Axis]: Borden (New Dairy Opco), Common Stock, Food, Beverage & Tobacco                              
Number of Shares | shares 11,167,000 [28],[41],[47],[51] 11,167,000 [28],[41],[47],[51] 11,167,000 [28],[41],[47],[51] 11,167,000 [28],[41],[47],[51] 11,167,000 [28],[41],[47],[51] 11,167,000 [28],[41],[47],[51] 11,167,000 [28],[41],[47],[51] 11,167,000 [23],[42],[46],[50] 11,167,000 [23],[42],[46],[50] 11,167,000 [23],[42],[46],[50] 11,167,000 [23],[42],[46],[50] 11,167,000 [23],[42],[46],[50] 11,167,000 [23],[42],[46],[50] 11,167,000 [23],[42],[46],[50]  
Amortized Cost $ 9.1 [28],[41],[47],[51]             $ 9.1 [23],[42],[46],[50]              
Fair Value 4.8 [1],[28],[41],[47],[51]             $ 7.7 [2],[23],[42],[46],[50]              
Investment, Identifier [Axis]: Borden Dairy Co                              
Variable Rate [20],[23],[32],[42]               8.25% 8.25% 8.25% 8.25% 8.25% 8.25% 8.25%  
Floor Rate [20],[23],[32],[42]               1.00% 1.00% 1.00% 1.00% 1.00% 1.00% 1.00%  
Principal Amount [6],[20],[23],[32],[42]               $ 65.0              
Amortized Cost [20],[23],[32],[42]               25.4              
Fair Value $ 0.0             $ 0.0 [2],[20],[23],[32],[42]             0.0
Investment, Identifier [Axis]: Bowery Farming Inc                              
Variable Rate [32]               10.00% 10.00% 10.00% 10.00% 10.00% 10.00% 10.00%  
Floor Rate [32]               1.00% 1.00% 1.00% 1.00% 1.00% 1.00% 1.00%  
Principal Amount [6],[32]               $ 75.0              
Amortized Cost [32]               74.3              
Fair Value [2],[32]               $ 69.3              
Investment, Identifier [Axis]: Bowery Farming Inc, Food, Beverage & Tobacco                              
Variable Rate [12],[15] 10.00% 10.00% 10.00% 10.00% 10.00% 10.00% 10.00%                
Floor Rate [15] 1.00% 1.00% 1.00% 1.00% 1.00% 1.00% 1.00%                
Principal Amount [15],[17] $ 75.0                            
Amortized Cost [15] 74.4                            
Fair Value [3],[15] $ 70.3                            
Investment, Identifier [Axis]: Bowery Farming Inc, Warrants, Food, Beverage & Tobacco                              
Number of Shares | shares 161,828 [15],[28] 161,828 [15],[28] 161,828 [15],[28] 161,828 [15],[28] 161,828 [15],[28] 161,828 [15],[28] 161,828 [15],[28] 161,828 [23],[32] 161,828 [23],[32] 161,828 [23],[32] 161,828 [23],[32] 161,828 [23],[32] 161,828 [23],[32] 161,828 [23],[32]  
Amortized Cost $ 0.0 [15],[28]             $ 0.0 [23],[32]              
Fair Value $ 2.5 [1],[15],[28]             $ 5.2 [2],[23],[32]              
Investment, Identifier [Axis]: Byrider Finance LLC                              
Variable Rate [32],[52]               10.00% 10.00% 10.00% 10.00% 10.00% 10.00% 10.00%  
PIK Rate [32],[52]               0.50% 0.50% 0.50% 0.50% 0.50% 0.50% 0.50%  
Floor Rate [32],[52]               1.30% 1.30% 1.30% 1.30% 1.30% 1.30% 1.30%  
Principal Amount [6],[32],[52]               $ 54.3              
Amortized Cost [32],[52]               52.8              
Fair Value [2],[32],[52]               $ 54.4              
Investment, Identifier [Axis]: Byrider Finance LLC | Maximum                              
PIK Rate [32],[52]               0.50% 0.50% 0.50% 0.50% 0.50% 0.50% 0.50%  
Investment, Identifier [Axis]: Byrider Finance LLC, Private Equity, Automobiles & Components                              
Number of Shares | shares [15],[28],[53] 54,407 54,407 54,407 54,407 54,407 54,407 54,407                
Amortized Cost [15],[28],[53] $ 0.0                            
Fair Value [3],[15],[28],[53] $ 0.0                            
Investment, Identifier [Axis]: Byrider Finance LLC, Structured Mezzanine, Automobiles & Components                              
Variable Rate [5],[7]               10.50% 10.50% 10.50% 10.50% 10.50% 10.50% 10.50%  
Floor Rate [5]               0.30% 0.30% 0.30% 0.30% 0.30% 0.30% 0.30%  
Principal Amount [5],[6]               $ 23.0              
Amortized Cost [5]               23.0              
Fair Value [2],[5]               $ 23.0              
Investment, Identifier [Axis]: Byrider Finance LLC, Structured Mezzanine, Automobiles & Components 1                              
Variable Rate [12],[15] 10.50% 10.50% 10.50% 10.50% 10.50% 10.50% 10.50%                
Floor Rate [15] 0.30% 0.30% 0.30% 0.30% 0.30% 0.30% 0.30%                
Principal Amount [15],[17] $ 16.2                            
Amortized Cost [15] 16.2                            
Fair Value [3],[15] $ 16.1                            
Investment, Identifier [Axis]: Byrider Finance LLC, Structured Mezzanine, Automobiles & Components 2                              
Variable Rate [4],[12] 10.50% 10.50% 10.50% 10.50% 10.50% 10.50% 10.50%                
Floor Rate [4] 0.30% 0.30% 0.30% 0.30% 0.30% 0.30% 0.30%                
Principal Amount [4],[17] $ 6.8                            
Amortized Cost [4] 6.8                            
Fair Value [3],[4] $ 6.8                            
Investment, Identifier [Axis]: Byrider Finance LLC, Term Loan, Automobiles & Components                              
Number of Shares | shares [15],[28],[53] 5,000,000 5,000,000 5,000,000 5,000,000 5,000,000 5,000,000 5,000,000                
Amortized Cost [15],[28],[53] $ 5.0                            
Fair Value [3],[15],[28],[53] $ 5.0                            
Investment, Identifier [Axis]: CDS US Intermediate Holdings Inc, Warrant, Media & Entertainment                              
Number of Shares | shares 2,023,714 [15],[28],[29] 2,023,714 [15],[28],[29] 2,023,714 [15],[28],[29] 2,023,714 [15],[28],[29] 2,023,714 [15],[28],[29] 2,023,714 [15],[28],[29] 2,023,714 [15],[28],[29] 2,023,714 [23],[24],[32] 2,023,714 [23],[24],[32] 2,023,714 [23],[24],[32] 2,023,714 [23],[24],[32] 2,023,714 [23],[24],[32] 2,023,714 [23],[24],[32] 2,023,714 [23],[24],[32]  
Amortized Cost $ 0.0 [15],[28],[29]             $ 0.0 [23],[24],[32]              
Fair Value $ 4.0 [1],[15],[28],[29]             $ 0.0 [2],[23],[24],[32]              
Investment, Identifier [Axis]: CFC Underwriting Ltd, Insurance                              
Variable Rate [4],[12],[29] 5.50% 5.50% 5.50% 5.50% 5.50% 5.50% 5.50%                
PIK Rate [4],[12],[29] 0.00% 0.00% 0.00% 0.00% 0.00% 0.00% 0.00%                
Floor Rate [4],[29] 0.00% 0.00% 0.00% 0.00% 0.00% 0.00% 0.00%                
Principal Amount | £ [4],[17],[29]         £ 4.7                    
Amortized Cost [4],[29] $ 5.7                            
Fair Value [3],[4],[29] $ 5.7                            
Investment, Identifier [Axis]: CFC Underwriting Ltd, Insurance | Maximum                              
PIK Rate [4],[12],[29] 2.80% 2.80% 2.80% 2.80% 2.80% 2.80% 2.80%                
Investment, Identifier [Axis]: CSafe Global, Capital Goods 1                              
Variable Rate [12],[13],[14],[15],[16],[18],[19],[40] 6.25% 6.25% 6.25% 6.25% 6.25% 6.25% 6.25%                
Floor Rate [13],[14],[15],[16],[18],[19],[40] 0.80% 0.80% 0.80% 0.80% 0.80% 0.80% 0.80%                
Principal Amount [13],[14],[15],[16],[17],[18],[19],[40] $ 186.8                            
Amortized Cost [13],[14],[15],[16],[18],[19],[40] 181.5                            
Fair Value [3],[13],[14],[15],[16],[18],[19],[40] $ 186.8                            
Investment, Identifier [Axis]: CSafe Global, Capital Goods 2                              
Variable Rate [12],[15] 6.25% 6.25% 6.25% 6.25% 6.25% 6.25% 6.25%                
Floor Rate [15] 0.80% 0.80% 0.80% 0.80% 0.80% 0.80% 0.80%                
Principal Amount | £ [15],[17]         £ 27.2                    
Amortized Cost [15] $ 35.9                            
Fair Value [3],[15] $ 32.8                            
Investment, Identifier [Axis]: CSafe Global, Capital Goods 3                              
Variable Rate [12],[15] 6.25% 6.25% 6.25% 6.25% 6.25% 6.25% 6.25%                
Floor Rate [15] 0.80% 0.80% 0.80% 0.80% 0.80% 0.80% 0.80%                
Principal Amount [15],[17] $ 11.8                            
Amortized Cost [15] 11.8                            
Fair Value [3],[15] $ 11.8                            
Investment, Identifier [Axis]: CSafe Global, Capital Goods 4                              
Variable Rate [4],[12] 6.25% 6.25% 6.25% 6.25% 6.25% 6.25% 6.25%                
Floor Rate [4] 0.80% 0.80% 0.80% 0.80% 0.80% 0.80% 0.80%                
Principal Amount [4],[17] $ 34.9                            
Amortized Cost [4] 34.9                            
Fair Value [3],[4] $ 34.7                            
Investment, Identifier [Axis]: CSafe Global, Senior Secured Loans—First Lien, Capital Goods, August 13, 2028                              
Variable Rate [32]               6.25% 6.25% 6.25% 6.25% 6.25% 6.25% 6.25%  
Floor Rate [32]               0.80% 0.80% 0.80% 0.80% 0.80% 0.80% 0.80%  
Principal Amount [6],[32]               $ 11.9              
Amortized Cost [32]               11.9              
Fair Value [2],[32]               $ 11.9              
Investment, Identifier [Axis]: CSafe Global, Senior Secured Loans—First Lien, Capital Goods, December 23, 2026                              
Variable Rate [5]               6.25% 6.25% 6.25% 6.25% 6.25% 6.25% 6.25%  
Floor Rate [5]               0.80% 0.80% 0.80% 0.80% 0.80% 0.80% 0.80%  
Principal Amount [5],[6]               $ 34.9              
Amortized Cost [5]               34.9              
Fair Value [2],[5]               $ 34.6              
Investment, Identifier [Axis]: CSafe Global, Senior Secured Loans—First Lien, Capital Goods, December 23, 2027 -1                              
Variable Rate [8],[9],[10],[32],[38],[39],[43]               6.25% 6.25% 6.25% 6.25% 6.25% 6.25% 6.25%  
Floor Rate [8],[9],[10],[32],[38],[39],[43]               0.80% 0.80% 0.80% 0.80% 0.80% 0.80% 0.80%  
Principal Amount [6],[8],[9],[10],[32],[38],[39],[43]               $ 188.7              
Amortized Cost [8],[9],[10],[32],[38],[39],[43]               182.5              
Fair Value [2],[8],[9],[10],[32],[38],[39],[43]               $ 188.7              
Investment, Identifier [Axis]: CSafe Global, Senior Secured Loans—First Lien, Capital Goods, December 23, 2027 -2                              
Variable Rate [32]               6.25% 6.25% 6.25% 6.25% 6.25% 6.25% 6.25%  
Floor Rate [32]               0.80% 0.80% 0.80% 0.80% 0.80% 0.80% 0.80%  
Principal Amount | £ [6],[32]                       £ 27.4      
Amortized Cost [32]               $ 36.3              
Fair Value [2],[32]               $ 37.1              
Investment, Identifier [Axis]: CTI Foods Holding Co LLC, Common Stock, Food, Beverage & Tobacco                              
Number of Shares | shares 5,892 [15],[28] 5,892 [15],[28] 5,892 [15],[28] 5,892 [15],[28] 5,892 [15],[28] 5,892 [15],[28] 5,892 [15],[28] 5,892 [23],[32] 5,892 [23],[32] 5,892 [23],[32] 5,892 [23],[32] 5,892 [23],[32] 5,892 [23],[32] 5,892 [23],[32]  
Amortized Cost $ 0.7 [15],[28]             $ 0.7 [23],[32]              
Fair Value $ 0.0 [1],[15],[28]             $ 0.0 [2],[23],[32]              
Investment, Identifier [Axis]: Caldic BV, Retailing 1                              
Variable Rate [12],[15],[29],[37] 3.50% 3.50% 3.50% 3.50% 3.50% 3.50% 3.50%                
Floor Rate [15],[29],[37] 0.00% 0.00% 0.00% 0.00% 0.00% 0.00% 0.00%                
Principal Amount | € [15],[17],[29],[37]       € 0.8                      
Amortized Cost [15],[29],[37] $ 0.9                            
Fair Value [3],[15],[29],[37] $ 0.8                            
Investment, Identifier [Axis]: Caldic BV, Retailing 2                              
Variable Rate [12],[15],[29],[37] 3.75% 3.75% 3.75% 3.75% 3.75% 3.75% 3.75%                
Floor Rate [15],[29],[37] 0.50% 0.50% 0.50% 0.50% 0.50% 0.50% 0.50%                
Principal Amount [15],[17],[29],[37] $ 1.4                            
Amortized Cost [15],[29],[37] 1.4                            
Fair Value [3],[15],[29],[37] $ 1.4                            
Investment, Identifier [Axis]: Caldic BV, Retailing 3                              
Variable Rate [12] 7.25% 7.25% 7.25% 7.25% 7.25% 7.25% 7.25%                
Floor Rate [15],[29] 0.50% 0.50% 0.50% 0.50% 0.50% 0.50% 0.50%                
Principal Amount [15],[17],[29] $ 40.0                            
Amortized Cost [15],[29] 39.0                            
Fair Value [3],[15],[29] $ 38.2                            
Investment, Identifier [Axis]: Callodine Commercial Finance LLC, 2L Term Loan A, Diversified Financials                              
Variable Rate 9.00% [12],[15] 9.00% [12],[15] 9.00% [12],[15] 9.00% [12],[15] 9.00% [12],[15] 9.00% [12],[15] 9.00% [12],[15] 9.00% [7],[32] 9.00% [7],[32] 9.00% [7],[32] 9.00% [7],[32] 9.00% [7],[32] 9.00% [7],[32] 9.00% [7],[32]  
Floor Rate 1.00% [15] 1.00% [15] 1.00% [15] 1.00% [15] 1.00% [15] 1.00% [15] 1.00% [15] 1.00% [32] 1.00% [32] 1.00% [32] 1.00% [32] 1.00% [32] 1.00% [32] 1.00% [32]  
Principal Amount $ 125.0 [15],[17]             $ 125.0 [6],[32]              
Amortized Cost 119.3 [15]             118.0 [32]              
Fair Value $ 125.3 [3],[15]             $ 125.6 [2],[32]              
Investment, Identifier [Axis]: Callodine Commercial Finance LLC, 2L Term Loan B, Diversified Financials                              
Variable Rate [5],[7]               9.00% 9.00% 9.00% 9.00% 9.00% 9.00% 9.00%  
Floor Rate [5]               1.00% 1.00% 1.00% 1.00% 1.00% 1.00% 1.00%  
Principal Amount [5],[6]               $ 40.3              
Amortized Cost [5]               40.3              
Fair Value [2],[5]               $ 40.5              
Investment, Identifier [Axis]: Callodine Commercial Finance LLC, 2L Term Loan B, Diversified Financials 1                              
Variable Rate [12],[15] 9.00% 9.00% 9.00% 9.00% 9.00% 9.00% 9.00%                
Floor Rate [15] 1.00% 1.00% 1.00% 1.00% 1.00% 1.00% 1.00%                
Principal Amount [15],[17] $ 12.0                            
Amortized Cost [15] 12.0                            
Fair Value [3],[15] $ 12.0                            
Investment, Identifier [Axis]: Callodine Commercial Finance LLC, 2L Term Loan B, Diversified Financials 2                              
Variable Rate [4],[12] 9.00% 9.00% 9.00% 9.00% 9.00% 9.00% 9.00%                
Floor Rate [4] 1.00% 1.00% 1.00% 1.00% 1.00% 1.00% 1.00%                
Principal Amount [4],[17] $ 36.1                            
Amortized Cost [4] 36.1                            
Fair Value [3],[4] $ 36.1                            
Investment, Identifier [Axis]: Capital Automotive LP, Private Equity, Real Estate                              
Number of Shares | shares 21,640,936 [15],[29] 21,640,936 [15],[29] 21,640,936 [15],[29] 21,640,936 [15],[29] 21,640,936 [15],[29] 21,640,936 [15],[29] 21,640,936 [15],[29] 21,640,936 [6],[24],[32] 21,640,936 [6],[24],[32] 21,640,936 [6],[24],[32] 21,640,936 [6],[24],[32] 21,640,936 [6],[24],[32] 21,640,936 [6],[24],[32] 21,640,936 [6],[24],[32]  
Amortized Cost $ 23.7 [15],[29]             $ 23.7 [24],[32]              
Fair Value $ 27.0 [3],[15],[29]             $ 28.1 [2],[24],[32]              
Investment, Identifier [Axis]: Capital Automotive LP, Structured Mezzanine, Real Estate                              
Rate 11.00% [12],[15],[29] 11.00% [12],[15],[29] 11.00% [12],[15],[29] 11.00% [12],[15],[29] 11.00% [12],[15],[29] 11.00% [12],[15],[29] 11.00% [12],[15],[29] 11.00% [7],[24],[32] 11.00% [7],[24],[32] 11.00% [7],[24],[32] 11.00% [7],[24],[32] 11.00% [7],[24],[32] 11.00% [7],[24],[32] 11.00% [7],[24],[32]  
Number of Shares | shares [15],[29] 42,400,000 42,400,000 42,400,000 42,400,000 42,400,000 42,400,000 42,400,000                
Principal Amount [6],[24],[32]               $ 42.7              
Amortized Cost $ 41.7 [15],[29]             41.9 [24],[32]              
Fair Value $ 42.4 [3],[15],[29]             $ 42.7 [2],[24],[32]              
Investment, Identifier [Axis]: Catalina Marketing Corp, Common Stock, Media & Entertainment                              
Number of Shares | shares 6,522 [15],[28] 6,522 [15],[28] 6,522 [15],[28] 6,522 [15],[28] 6,522 [15],[28] 6,522 [15],[28] 6,522 [15],[28] 6,522 [23],[32] 6,522 [23],[32] 6,522 [23],[32] 6,522 [23],[32] 6,522 [23],[32] 6,522 [23],[32] 6,522 [23],[32]  
Amortized Cost $ 0.0 [15],[28]             $ 0.0 [23],[32]              
Fair Value $ 0.0 [1],[15],[28]             $ 0.0 [2],[23],[32]              
Investment, Identifier [Axis]: Cengage Learning, Inc, Common Stock, Media & Entertainment                              
Number of Shares | shares 227,802 [15],[28] 227,802 [15],[28] 227,802 [15],[28] 227,802 [15],[28] 227,802 [15],[28] 227,802 [15],[28] 227,802 [15],[28] 227,802 [23],[32] 227,802 [23],[32] 227,802 [23],[32] 227,802 [23],[32] 227,802 [23],[32] 227,802 [23],[32] 227,802 [23],[32]  
Amortized Cost $ 7.6 [15],[28]             $ 7.5 [23],[32]              
Fair Value $ 3.6 [1],[15],[28]             4.2 [2],[23],[32]              
Investment, Identifier [Axis]: Charlotte Russe Inc, Common Stock                              
Fair Value               $ 0.0             0.0
Investment, Identifier [Axis]: Cimarron Energy Inc                              
Variable Rate [20],[23],[32]               9.00% 9.00% 9.00% 9.00% 9.00% 9.00% 9.00%  
Floor Rate [20],[23],[32]               1.00% 1.00% 1.00% 1.00% 1.00% 1.00% 1.00%  
Principal Amount [6],[20],[23],[32]               $ 7.5              
Amortized Cost [20],[23],[32]               5.5              
Fair Value [2],[20],[23],[32]               $ 3.6              
Investment, Identifier [Axis]: Cimarron Energy Inc, Common Stock, Energy                              
Number of Shares | shares 4,302,293 [15],[28] 4,302,293 [15],[28] 4,302,293 [15],[28] 4,302,293 [15],[28] 4,302,293 [15],[28] 4,302,293 [15],[28] 4,302,293 [15],[28] 4,302,293 [23],[32] 4,302,293 [23],[32] 4,302,293 [23],[32] 4,302,293 [23],[32] 4,302,293 [23],[32] 4,302,293 [23],[32] 4,302,293 [23],[32]  
Amortized Cost $ 0.0 [15],[28]             $ 0.0 [23],[32]              
Fair Value $ 0.0 [1],[15],[28]             $ 0.0 [2],[23],[32]              
Investment, Identifier [Axis]: Cimarron Energy Inc, Energy                              
Variable Rate [12],[15],[25],[28] 9.00% 9.00% 9.00% 9.00% 9.00% 9.00% 9.00%                
Floor Rate [15],[25],[28] 1.00% 1.00% 1.00% 1.00% 1.00% 1.00% 1.00%                
Principal Amount [15],[17],[25],[28] $ 7.5                            
Amortized Cost [15],[25],[28] 4.8                            
Fair Value [3],[15],[25],[28] $ 3.7                            
Investment, Identifier [Axis]: Cimarron Energy Inc, Participation Option, Energy                              
Number of Shares | shares 25,000,000 [15],[28] 25,000,000 [15],[28] 25,000,000 [15],[28] 25,000,000 [15],[28] 25,000,000 [15],[28] 25,000,000 [15],[28] 25,000,000 [15],[28] 25,000,000 [23],[32] 25,000,000 [23],[32] 25,000,000 [23],[32] 25,000,000 [23],[32] 25,000,000 [23],[32] 25,000,000 [23],[32] 25,000,000 [23],[32]  
Amortized Cost $ 0.0 [15],[28]             $ 0.0 [23],[32]              
Fair Value $ 0.0 [1],[15],[28]             $ 0.0 [2],[23],[32]              
Investment, Identifier [Axis]: Clarience Technologies LLC, Capital Goods 1                              
Variable Rate [12],[13],[15],[16],[18],[34],[40] 6.25% 6.25% 6.25% 6.25% 6.25% 6.25% 6.25%                
Floor Rate [13],[15],[16],[18],[34],[40] 1.00% 1.00% 1.00% 1.00% 1.00% 1.00% 1.00%                
Principal Amount [13],[15],[16],[17],[18],[34],[40] $ 294.0                            
Amortized Cost [13],[15],[16],[18],[34],[40] 284.6                            
Fair Value [3],[13],[15],[16],[18],[34],[40] $ 287.9                            
Investment, Identifier [Axis]: Clarience Technologies LLC, Capital Goods 2                              
Variable Rate [4],[12] 6.25% 6.25% 6.25% 6.25% 6.25% 6.25% 6.25%                
Floor Rate [4] 1.00% 1.00% 1.00% 1.00% 1.00% 1.00% 1.00%                
Principal Amount [4],[17] $ 25.4                            
Amortized Cost [4] 25.3                            
Fair Value [3],[4] $ 24.9                            
Investment, Identifier [Axis]: Clarience Technologies LLC, Senior Secured Loans—First Lien, Capital Goods, December 13, 2024                              
Floor Rate [5]               1.00% 1.00% 1.00% 1.00% 1.00% 1.00% 1.00%  
Principal Amount [5],[6]               $ 10.8              
Amortized Cost [5]               10.8              
Fair Value [2],[5]               $ 11.1              
Investment, Identifier [Axis]: Clarience Technologies LLC, Senior Secured Loans—First Lien, Capital Goods, December 14, 2026                              
Variable Rate [8],[10],[32],[33],[39],[43]               6.25% 6.25% 6.25% 6.25% 6.25% 6.25% 6.25%  
Floor Rate [8],[10],[32],[33],[39],[43]               1.00% 1.00% 1.00% 1.00% 1.00% 1.00% 1.00%  
Principal Amount [6],[8],[10],[32],[33],[39],[43]               $ 268.0              
Amortized Cost [8],[10],[32],[33],[39],[43]               257.2              
Fair Value [2],[8],[10],[32],[33],[39],[43]               $ 270.7              
Investment, Identifier [Axis]: Clarience Technologies LLC, Senior Secured Loans—First Lien, Capital Goods, December 31, 2026 -1                              
Variable Rate [32]               6.25% 6.25% 6.25% 6.25% 6.25% 6.25% 6.25%  
Floor Rate [32]               1.00% 1.00% 1.00% 1.00% 1.00% 1.00% 1.00%  
Principal Amount [6],[32]               $ 18.1              
Amortized Cost [32]               17.6              
Fair Value [2],[32]               $ 18.4              
Investment, Identifier [Axis]: Clarience Technologies LLC, Senior Secured Loans—First Lien, Capital Goods, December 31, 2026 -2                              
Variable Rate [5]               6.25% 6.25% 6.25% 6.25% 6.25% 6.25% 6.25%  
Floor Rate [5]               1.00% 1.00% 1.00% 1.00% 1.00% 1.00% 1.00%  
Principal Amount [5],[6]               $ 25.4              
Amortized Cost [5]               25.2              
Fair Value [2],[5]               $ 25.4              
Investment, Identifier [Axis]: ClubCorp Club Operations Inc                              
Rate [32],[36]               8.50% 8.50% 8.50% 8.50% 8.50% 8.50% 8.50%  
Principal Amount [6],[32],[36]               $ 37.3              
Amortized Cost [32],[36]               35.4              
Fair Value [2],[32],[36]               $ 35.7              
Investment, Identifier [Axis]: Community Brands Inc, Software & Services 1                              
Variable Rate [12],[15] 5.75% 5.75% 5.75% 5.75% 5.75% 5.75% 5.75%                
Floor Rate [15] 0.80% 0.80% 0.80% 0.80% 0.80% 0.80% 0.80%                
Principal Amount [15],[17] $ 32.7                            
Amortized Cost [15] 32.1                            
Fair Value [3],[15] $ 31.6                            
Investment, Identifier [Axis]: Community Brands Inc, Software & Services 2                              
Variable Rate [4],[12] 5.75% 5.75% 5.75% 5.75% 5.75% 5.75% 5.75%                
Floor Rate [4] 0.80% 0.80% 0.80% 0.80% 0.80% 0.80% 0.80%                
Principal Amount [4],[17] $ 3.9                            
Amortized Cost [4] 3.8                            
Fair Value [3],[4] $ 3.7                            
Investment, Identifier [Axis]: Community Brands Inc, Software & Services 3                              
Variable Rate [4],[12] 5.75% 5.75% 5.75% 5.75% 5.75% 5.75% 5.75%                
Floor Rate [4] 0.80% 0.80% 0.80% 0.80% 0.80% 0.80% 0.80%                
Principal Amount [4],[17] $ 1.9                            
Amortized Cost [4] 1.9                            
Fair Value [3],[4] 1.9                            
Investment, Identifier [Axis]: Constellis Holdings LLC                              
Variable Rate [32],[42],[43]               11.00% 11.00% 11.00% 11.00% 11.00% 11.00% 11.00%  
PIK Rate [32],[42],[43]               0.00% 0.00% 0.00% 0.00% 0.00% 0.00% 0.00%  
Floor Rate [32],[42],[43]               1.00% 1.00% 1.00% 1.00% 1.00% 1.00% 1.00%  
Principal Amount [6],[32],[42],[43]               $ 13.5              
Amortized Cost [32],[42],[43]               12.5              
Fair Value [2],[32],[42],[43]               $ 12.0              
Investment, Identifier [Axis]: Constellis Holdings LLC | Maximum                              
PIK Rate [32],[42],[43]               10.00% 10.00% 10.00% 10.00% 10.00% 10.00% 10.00%  
Investment, Identifier [Axis]: Constellis Holdings LLC 1                              
Variable Rate [32],[42]               7.50% 7.50% 7.50% 7.50% 7.50% 7.50% 7.50%  
Floor Rate [32],[42]               1.00% 1.00% 1.00% 1.00% 1.00% 1.00% 1.00%  
Principal Amount [6],[32],[42]               $ 15.0              
Amortized Cost [32],[42]               14.0              
Fair Value 15.0             15.0 [2],[32],[42]             0.0
Investment, Identifier [Axis]: Constellis Holdings LLC 2                              
Fair Value $ 13.5             12.0             0.0
Investment, Identifier [Axis]: Constellis Holdings LLC, Capital Goods 1                              
Variable Rate [12],[15],[41] 7.50% 7.50% 7.50% 7.50% 7.50% 7.50% 7.50%                
Floor Rate [15],[41] 1.00% 1.00% 1.00% 1.00% 1.00% 1.00% 1.00%                
Principal Amount [15],[17],[41] $ 15.0                            
Amortized Cost [15],[41] 14.4                            
Fair Value [3],[15],[41] $ 15.0                            
Investment, Identifier [Axis]: Constellis Holdings LLC, Capital Goods 2                              
Variable Rate [12] 11.00% 11.00% 11.00% 11.00% 11.00% 11.00% 11.00%                
PIK Rate [12] 5.00% 5.00% 5.00% 5.00% 5.00% 5.00% 5.00%                
Floor Rate [15],[41] 1.00% 1.00% 1.00% 1.00% 1.00% 1.00% 1.00%                
Principal Amount [15],[17],[41] $ 13.5                            
Amortized Cost [15],[41] 12.8                            
Fair Value [3],[15],[41] $ 13.5                            
Investment, Identifier [Axis]: Constellis Holdings LLC, Capital Goods 2 | Maximum                              
PIK Rate [12] 0.00% 0.00% 0.00% 0.00% 0.00% 0.00% 0.00%                
Investment, Identifier [Axis]: Constellis Holdings LLC, Private Equity                              
Fair Value $ 6.3             $ 0.2             $ 0.0
Investment, Identifier [Axis]: Constellis Holdings LLC, Private Equity, Capital Goods                              
Number of Shares | shares 849,702 [15],[18],[28],[41] 849,702 [15],[18],[28],[41] 849,702 [15],[18],[28],[41] 849,702 [15],[18],[28],[41] 849,702 [15],[18],[28],[41] 849,702 [15],[18],[28],[41] 849,702 [15],[18],[28],[41] 849,702 [23],[32],[42],[43] 849,702 [23],[32],[42],[43] 849,702 [23],[32],[42],[43] 849,702 [23],[32],[42],[43] 849,702 [23],[32],[42],[43] 849,702 [23],[32],[42],[43] 849,702 [23],[32],[42],[43]  
Amortized Cost $ 10.3 [15],[18],[28],[41]             $ 10.3 [23],[32],[42],[43]              
Fair Value $ 6.3 [1],[15],[18],[28],[41]             $ 0.2 [2],[23],[32],[42],[43]              
Investment, Identifier [Axis]: Corsearch Intermediate Inc, Senior Secured Loans—First Lien, Software & Services -1                              
Variable Rate [32],[39]               5.50% 5.50% 5.50% 5.50% 5.50% 5.50% 5.50%  
Floor Rate [32],[39]               1.00% 1.00% 1.00% 1.00% 1.00% 1.00% 1.00%  
Principal Amount [6],[32],[39]               $ 30.1              
Amortized Cost [32],[39]               28.3              
Fair Value [2],[32],[39]               $ 30.1              
Investment, Identifier [Axis]: Corsearch Intermediate Inc, Senior Secured Loans—First Lien, Software & Services -2                              
Variable Rate [5]               5.50% 5.50% 5.50% 5.50% 5.50% 5.50% 5.50%  
Floor Rate [5]               1.00% 1.00% 1.00% 1.00% 1.00% 1.00% 1.00%  
Principal Amount [5],[6]               $ 4.4              
Amortized Cost [5]               4.4              
Fair Value [2],[5]               4.4              
Investment, Identifier [Axis]: Corsearch Intermediate Inc, Software & Services 1                              
Variable Rate [12],[15],[40] 5.50% 5.50% 5.50% 5.50% 5.50% 5.50% 5.50%                
Floor Rate [15],[40] 1.00% 1.00% 1.00% 1.00% 1.00% 1.00% 1.00%                
Principal Amount [15],[17],[40] $ 30.1                            
Amortized Cost [15],[40] 28.5                            
Fair Value [3],[15],[40] $ 29.8                            
Investment, Identifier [Axis]: Corsearch Intermediate Inc, Software & Services 2                              
Variable Rate [4],[12] 5.50% 5.50% 5.50% 5.50% 5.50% 5.50% 5.50%                
Floor Rate [4] 1.00% 1.00% 1.00% 1.00% 1.00% 1.00% 1.00%                
Principal Amount [4],[17] $ 4.4                            
Amortized Cost [4] 4.4                            
Fair Value [3],[4] 4.4                            
Investment, Identifier [Axis]: Credit Opportunities Partners JV, LLC 2                              
Fair Value 1,428.3             1,396.2              
Investment, Identifier [Axis]: Credit Opportunities Partners JV, LLC, Diversified Financials                              
Principal Amount 1,637.3 [15],[17],[29],[30]             1,462.3 [6],[24],[31],[32]              
Amortized Cost 1,571.7 [15],[29],[30]             1,396.7 [24],[31],[32]              
Fair Value $ 1,428.3 [3],[15],[29],[30]             $ 1,396.2 [2],[24],[31],[32]              
Investment, Identifier [Axis]: Cubic Corp                              
Variable Rate [32]               7.63% 7.63% 7.63% 7.63% 7.63% 7.63% 7.63%  
Floor Rate [32]               0.80% 0.80% 0.80% 0.80% 0.80% 0.80% 0.80%  
Principal Amount [6],[32]               $ 54.8              
Amortized Cost [32]               51.8              
Fair Value [2],[32]               $ 55.6              
Investment, Identifier [Axis]: Cubic Corp, Preferred Stock, Software & Services                              
PIK Rate 11.00% [12],[15] 11.00% [12],[15] 11.00% [12],[15] 11.00% [12],[15] 11.00% [12],[15] 11.00% [12],[15] 11.00% [12],[15]               11.00% [7],[32]
Number of Shares | shares 42,141,600 [15] 42,141,600 [15] 42,141,600 [15] 42,141,600 [15] 42,141,600 [15] 42,141,600 [15] 42,141,600 [15] 42,141,600 [32] 42,141,600 [32] 42,141,600 [32] 42,141,600 [32] 42,141,600 [32] 42,141,600 [32] 42,141,600 [32]  
Amortized Cost $ 39.8 [15]             $ 39.6 [32]              
Fair Value $ 34.7 [1],[15]             $ 42.3 [2],[32]              
Investment, Identifier [Axis]: Cubic Corp, Preferred Stock, Software & Services | Maximum                              
PIK Rate 11.00% [12],[15] 11.00% [12],[15] 11.00% [12],[15] 11.00% [12],[15] 11.00% [12],[15] 11.00% [12],[15] 11.00% [12],[15]               11.00% [7],[32]
Investment, Identifier [Axis]: Cubic Corp, Software & Services                              
Variable Rate [12] 7.63% 7.63% 7.63% 7.63% 7.63% 7.63% 7.63%                
Floor Rate [15] 0.80% 0.80% 0.80% 0.80% 0.80% 0.80% 0.80%                
Principal Amount [15],[17] $ 44.8                            
Amortized Cost [15] 42.2                            
Fair Value [3],[15] $ 40.6                            
Investment, Identifier [Axis]: DOC Generici Srl, Pharmaceuticals, Biotechnology & Life Sciences 1                              
Variable Rate [12],[15],[29] 6.50% 6.50% 6.50% 6.50% 6.50% 6.50% 6.50%                
Floor Rate [15],[29] 0.00% 0.00% 0.00% 0.00% 0.00% 0.00% 0.00%                
Principal Amount | € [15],[17],[29]       € 23.1                      
Amortized Cost [15],[29] $ 22.5                            
Fair Value [3],[15],[29] $ 24.1                            
Investment, Identifier [Axis]: DOC Generici Srl, Pharmaceuticals, Biotechnology & Life Sciences 2                              
Variable Rate [4],[12],[29] 6.50% 6.50% 6.50% 6.50% 6.50% 6.50% 6.50%                
Floor Rate [4],[29] 0.00% 0.00% 0.00% 0.00% 0.00% 0.00% 0.00%                
Principal Amount | € [4],[17],[29]       € 2.4                      
Amortized Cost [4],[29] $ 2.3                            
Fair Value [3],[4],[29] $ 2.2                            
Investment, Identifier [Axis]: Datatel Inc                              
Variable Rate [32]               8.00% 8.00% 8.00% 8.00% 8.00% 8.00% 8.00%  
Floor Rate [32]               1.00% 1.00% 1.00% 1.00% 1.00% 1.00% 1.00%  
Principal Amount [6],[32]               $ 179.2              
Amortized Cost [32]               170.1              
Fair Value [2],[32]               $ 184.6              
Investment, Identifier [Axis]: Dental Care Alliance Inc, Health Care Equipment & Services 1                              
Variable Rate [12],[13],[15],[18],[19],[40] 6.41% 6.41% 6.41% 6.41% 6.41% 6.41% 6.41%                
Floor Rate [13],[15],[18],[19],[40] 0.80% 0.80% 0.80% 0.80% 0.80% 0.80% 0.80%                
Principal Amount [13],[15],[17],[18],[19],[40] $ 135.4                            
Amortized Cost [13],[15],[18],[19],[40] 131.7                            
Fair Value [3],[13],[15],[18],[19],[40] $ 132.7                            
Investment, Identifier [Axis]: Dental Care Alliance Inc, Health Care Equipment & Services 2                              
Variable Rate [4],[12] 6.41% 6.41% 6.41% 6.41% 6.41% 6.41% 6.41%                
Floor Rate [4] 0.80% 0.80% 0.80% 0.80% 0.80% 0.80% 0.80%                
Principal Amount [4],[17] $ 1.7                            
Amortized Cost [4] 1.7                            
Fair Value [3],[4] $ 1.6                            
Investment, Identifier [Axis]: Dental Care Alliance Inc, Senior Secured Loans—First Lien, Health Care Equipment & Services -1                              
Variable Rate [8],[32],[38],[39],[43]               6.25% 6.25% 6.25% 6.25% 6.25% 6.25% 6.25%  
Floor Rate [8],[32],[38],[39],[43]               0.80% 0.80% 0.80% 0.80% 0.80% 0.80% 0.80%  
Principal Amount [6],[8],[32],[38],[39],[43]               $ 90.3              
Amortized Cost [8],[32],[38],[39],[43]               86.1              
Fair Value [2],[8],[32],[38],[39],[43]               $ 90.4              
Investment, Identifier [Axis]: Dental Care Alliance Inc, Senior Secured Loans—First Lien, Health Care Equipment & Services -2                              
Variable Rate [32]               6.25% 6.25% 6.25% 6.25% 6.25% 6.25% 6.25%  
Floor Rate [32]               0.80% 0.80% 0.80% 0.80% 0.80% 0.80% 0.80%  
Principal Amount [6],[32]               $ 8.7              
Amortized Cost [32]               8.7              
Fair Value [2],[32]               $ 8.7              
Investment, Identifier [Axis]: Dental Care Alliance Inc, Senior Secured Loans—First Lien, Health Care Equipment & Services -3                              
Variable Rate [5]               6.25% 6.25% 6.25% 6.25% 6.25% 6.25% 6.25%  
Floor Rate [5]               0.80% 0.80% 0.80% 0.80% 0.80% 0.80% 0.80%  
Principal Amount [5],[6]               $ 13.6              
Amortized Cost [5]               13.6              
Fair Value [2],[5]               $ 13.7              
Investment, Identifier [Axis]: Element Materials Technology Group US Holdings Inc                              
Variable Rate [24],[32],[36]               3.50% 3.50% 3.50% 3.50% 3.50% 3.50% 3.50%  
Floor Rate [24],[32],[36]               1.00% 1.00% 1.00% 1.00% 1.00% 1.00% 1.00%  
Principal Amount [6],[24],[32],[36]               $ 1.9              
Amortized Cost [24],[32],[36]               1.9              
Fair Value [2],[24],[32],[36]               $ 1.9              
Investment, Identifier [Axis]: Element Materials Technology Group US Holdings Inc, Commercial & Professional Services 1                              
Variable Rate [12],[15],[29],[37] 4.25% 4.25% 4.25% 4.25% 4.25% 4.25% 4.25%                
Floor Rate [15],[29],[37] 0.00% 0.00% 0.00% 0.00% 0.00% 0.00% 0.00%                
Principal Amount | € [15],[17],[29],[37]       € 0.3                      
Amortized Cost [15],[29],[37] $ 0.4                            
Fair Value [3],[15],[29],[37] $ 0.4                            
Investment, Identifier [Axis]: Element Materials Technology Group US Holdings Inc, Commercial & Professional Services 2                              
Variable Rate [12],[15],[29],[37] 4.25% 4.25% 4.25% 4.25% 4.25% 4.25% 4.25%                
Floor Rate [15],[29],[37] 0.50% 0.50% 0.50% 0.50% 0.50% 0.50% 0.50%                
Principal Amount [15],[17],[29],[37] $ 1.4                            
Amortized Cost [15],[29],[37] 1.4                            
Fair Value [3],[15],[29],[37] $ 1.4                            
Investment, Identifier [Axis]: Element Materials Technology Group US Holdings Inc, Commercial & Professional Services 3                              
PIK Rate [12] 8.50% 8.50% 8.50% 8.50% 8.50% 8.50% 8.50%                
Floor Rate [15],[29] 0.50% 0.50% 0.50% 0.50% 0.50% 0.50% 0.50%                
Principal Amount [15],[17],[29] $ 67.9                            
Amortized Cost [15],[29] 66.5                            
Fair Value [3],[15],[29] $ 64.6                            
Investment, Identifier [Axis]: Element Materials Technology Group US Holdings Inc, Commercial & Professional Services 3 | Maximum                              
PIK Rate [12] 8.50% 8.50% 8.50% 8.50% 8.50% 8.50% 8.50%                
Investment, Identifier [Axis]: Ellucian Inc, Software & Services                              
Variable Rate [12] 8.00% 8.00% 8.00% 8.00% 8.00% 8.00% 8.00%                
Floor Rate [15] 1.00% 1.00% 1.00% 1.00% 1.00% 1.00% 1.00%                
Principal Amount [15],[17] $ 179.2                            
Amortized Cost [15] 170.9                            
Fair Value [3],[15] $ 177.5                            
Investment, Identifier [Axis]: Encora Digital Inc                              
PIK Rate [32]               9.80% 9.80% 9.80% 9.80% 9.80% 9.80% 9.80%  
Principal Amount [6],[32]               $ 21.6              
Amortized Cost [32]               20.9              
Fair Value [2],[32]               $ 20.9              
Investment, Identifier [Axis]: Encora Digital Inc | Maximum                              
PIK Rate [32]               9.80% 9.80% 9.80% 9.80% 9.80% 9.80% 9.80%  
Investment, Identifier [Axis]: Encora Digital Inc, Senior Secured Loans—First Lien, Software & Services -1                              
Variable Rate [32]               5.50% 5.50% 5.50% 5.50% 5.50% 5.50% 5.50%  
PIK Rate [32]               0.00% 0.00% 0.00% 0.00% 0.00% 0.00% 0.00%  
Floor Rate [32]               0.50% 0.50% 0.50% 0.50% 0.50% 0.50% 0.50%  
Principal Amount [6],[32]               $ 81.3              
Amortized Cost [32]               79.7              
Fair Value [2],[32]               $ 79.7              
Investment, Identifier [Axis]: Encora Digital Inc, Senior Secured Loans—First Lien, Software & Services -1 | Maximum                              
PIK Rate [32]               2.40% 2.40% 2.40% 2.40% 2.40% 2.40% 2.40%  
Investment, Identifier [Axis]: Encora Digital Inc, Senior Secured Loans—First Lien, Software & Services -2                              
Variable Rate [5]               5.50% 5.50% 5.50% 5.50% 5.50% 5.50% 5.50%  
Floor Rate [5]               0.50% 0.50% 0.50% 0.50% 0.50% 0.50% 0.50%  
Principal Amount [5],[6]               $ 19.6              
Amortized Cost [5]               19.4              
Fair Value [2],[5]               $ 19.2              
Investment, Identifier [Axis]: Encora Digital Inc, Software & Services 1                              
Variable Rate [12],[15] 5.50% 5.50% 5.50% 5.50% 5.50% 5.50% 5.50%                
PIK Rate [12],[15] 0.00% 0.00% 0.00% 0.00% 0.00% 0.00% 0.00%                
Floor Rate [15] 0.80% 0.80% 0.80% 0.80% 0.80% 0.80% 0.80%                
Principal Amount [15],[17] $ 65.1                            
Amortized Cost [15] 63.9                            
Fair Value [3],[15] $ 61.7                            
Investment, Identifier [Axis]: Encora Digital Inc, Software & Services 1 | Maximum                              
PIK Rate [12],[15] 2.40% 2.40% 2.40% 2.40% 2.40% 2.40% 2.40%                
Investment, Identifier [Axis]: Encora Digital Inc, Software & Services 2                              
Variable Rate [4],[12] 5.50% 5.50% 5.50% 5.50% 5.50% 5.50% 5.50%                
Floor Rate [4] 0.80% 0.80% 0.80% 0.80% 0.80% 0.80% 0.80%                
Principal Amount [4],[17] $ 19.6                            
Amortized Cost [4] 19.4                            
Fair Value [3],[4] $ 18.6                            
Investment, Identifier [Axis]: Encora Digital Inc, Software & Services 3                              
PIK Rate [12] 9.80% 9.80% 9.80% 9.80% 9.80% 9.80% 9.80%                
Principal Amount [15],[17] $ 23.8                            
Amortized Cost [15] 23.2                            
Fair Value [3],[15] $ 22.6                            
Investment, Identifier [Axis]: Encora Digital Inc, Software & Services 3 | Maximum                              
PIK Rate [12] 9.80% 9.80% 9.80% 9.80% 9.80% 9.80% 9.80%                
Investment, Identifier [Axis]: Entertainment Benefits Group LLC, Senior Secured Loans—First Lien Media & Entertainment, September 30, 2024 -1                              
Variable Rate [32]               5.75% 5.75% 5.75% 5.75% 5.75% 5.75% 5.75%  
PIK Rate [32]               2.50% 2.50% 2.50% 2.50% 2.50% 2.50% 2.50%  
Floor Rate [32]               1.00% 1.00% 1.00% 1.00% 1.00% 1.00% 1.00%  
Principal Amount [6],[32]               $ 0.4              
Amortized Cost [32]               0.4              
Fair Value [2],[32]               $ 0.4              
Investment, Identifier [Axis]: Entertainment Benefits Group LLC, Senior Secured Loans—First Lien Media & Entertainment, September 30, 2024 -1 | Maximum                              
PIK Rate [32]               2.50% 2.50% 2.50% 2.50% 2.50% 2.50% 2.50%  
Investment, Identifier [Axis]: Entertainment Benefits Group LLC, Senior Secured Loans—First Lien Media & Entertainment, September 30, 2024 -2                              
Variable Rate [5]               5.75% 5.75% 5.75% 5.75% 5.75% 5.75% 5.75%  
PIK Rate [5]               2.50% 2.50% 2.50% 2.50% 2.50% 2.50% 2.50%  
Floor Rate [5]               1.00% 1.00% 1.00% 1.00% 1.00% 1.00% 1.00%  
Principal Amount [5],[6]               $ 10.2              
Amortized Cost [5]               9.6              
Fair Value [2],[5]               $ 9.9              
Investment, Identifier [Axis]: Entertainment Benefits Group LLC, Senior Secured Loans—First Lien Media & Entertainment, September 30, 2024 -2 | Maximum                              
PIK Rate [5]               2.50% 2.50% 2.50% 2.50% 2.50% 2.50% 2.50%  
Investment, Identifier [Axis]: Entertainment Benefits Group LLC, Senior Secured Loans—First Lien Media & Entertainment, September 30, 2025                              
Variable Rate [8],[9],[32],[39],[43]               5.75% 5.75% 5.75% 5.75% 5.75% 5.75% 5.75%  
PIK Rate [8],[9],[32],[39],[43]               2.50% 2.50% 2.50% 2.50% 2.50% 2.50% 2.50%  
Floor Rate [8],[9],[32],[39],[43]               1.00% 1.00% 1.00% 1.00% 1.00% 1.00% 1.00%  
Principal Amount [6],[8],[9],[32],[39],[43]               $ 64.0              
Amortized Cost [8],[9],[32],[39],[43]               59.1              
Fair Value [2],[8],[9],[32],[39],[43]               $ 61.7              
Investment, Identifier [Axis]: Entertainment Benefits Group LLC, Senior Secured Loans—First Lien Media & Entertainment, September 30, 2025 | Maximum                              
PIK Rate [8],[9],[32],[39],[43]               2.50% 2.50% 2.50% 2.50% 2.50% 2.50% 2.50%  
Investment, Identifier [Axis]: Envigo Laboratories Inc, Series A Warrant, Health Care Equipment & Services                              
Number of Shares | shares 10,924 [28],[34] 10,924 [28],[34] 10,924 [28],[34] 10,924 [28],[34] 10,924 [28],[34] 10,924 [28],[34] 10,924 [28],[34] 10,924 [23],[33] 10,924 [23],[33] 10,924 [23],[33] 10,924 [23],[33] 10,924 [23],[33] 10,924 [23],[33] 10,924 [23],[33]  
Amortized Cost $ 0.0 [28],[34]             $ 0.0 [23],[33]              
Fair Value $ 0.0 [1],[28],[34]             $ 0.0 [2],[23],[33]              
Investment, Identifier [Axis]: Envigo Laboratories Inc, Series B Warrant, Health Care Equipment & Services                              
Number of Shares | shares 17,515 [28],[34] 17,515 [28],[34] 17,515 [28],[34] 17,515 [28],[34] 17,515 [28],[34] 17,515 [28],[34] 17,515 [28],[34] 17,515 [23],[33] 17,515 [23],[33] 17,515 [23],[33] 17,515 [23],[33] 17,515 [23],[33] 17,515 [23],[33] 17,515 [23],[33]  
Amortized Cost $ 0.0 [28],[34]             $ 0.0 [23],[33]              
Fair Value $ 0.0 [1],[28],[34]             $ 0.0 [2],[23],[33]              
Investment, Identifier [Axis]: Envirotainer Ltd, Transportation                              
Variable Rate [4],[12],[29] 6.00% 6.00% 6.00% 6.00% 6.00% 6.00% 6.00%                
PIK Rate [4],[12],[29] 0.00% 0.00% 0.00% 0.00% 0.00% 0.00% 0.00%                
Floor Rate [4],[29] 0.00% 0.00% 0.00% 0.00% 0.00% 0.00% 0.00%                
Principal Amount | € [4],[17],[29]       € 2.7                      
Amortized Cost [4],[29] $ 2.7                            
Fair Value [3],[4],[29] $ 2.6                            
Investment, Identifier [Axis]: Envirotainer Ltd, Transportation | Maximum                              
PIK Rate [4],[12],[29] 3.00% 3.00% 3.00% 3.00% 3.00% 3.00% 3.00%                
Investment, Identifier [Axis]: Excelitas Technologies Corp, Technology Hardware & Equipment 1                              
Variable Rate [12],[15] 5.75% 5.75% 5.75% 5.75% 5.75% 5.75% 5.75%                
Floor Rate [15] 0.80% 0.80% 0.80% 0.80% 0.80% 0.80% 0.80%                
Principal Amount [15],[17] $ 1.3                            
Amortized Cost [15] 1.3                            
Fair Value [3],[15] $ 1.3                            
Investment, Identifier [Axis]: Excelitas Technologies Corp, Technology Hardware & Equipment 2                              
Variable Rate [4],[12] 5.75% 5.75% 5.75% 5.75% 5.75% 5.75% 5.75%                
Floor Rate [4] 0.80% 0.80% 0.80% 0.80% 0.80% 0.80% 0.80%                
Principal Amount [4],[17] $ 1.0                            
Amortized Cost [4] 1.0                            
Fair Value [3],[4] $ 1.0                            
Investment, Identifier [Axis]: Excelitas Technologies Corp, Technology Hardware & Equipment 3                              
Variable Rate [4],[12] 5.75% 5.75% 5.75% 5.75% 5.75% 5.75% 5.75%                
Floor Rate [4] 0.80% 0.80% 0.80% 0.80% 0.80% 0.80% 0.80%                
Principal Amount [4],[17] $ 4.7                            
Amortized Cost [4] 4.7                            
Fair Value [3],[4] 4.6                            
Investment, Identifier [Axis]: Fairway Group Holdings Corp                              
PIK Rate [20],[23],[32],[42]               11.00% 11.00% 11.00% 11.00% 11.00% 11.00% 11.00%  
Principal Amount [6],[20],[23],[32],[42]               $ 6.9              
Amortized Cost [20],[23],[32],[42]               0.0              
Fair Value               $ 0.0 [2],[20],[23],[32],[42]             $ 0.0
Investment, Identifier [Axis]: Fairway Group Holdings Corp | Maximum                              
PIK Rate [20],[23],[32],[42]               11.00% 11.00% 11.00% 11.00% 11.00% 11.00% 11.00%  
Investment, Identifier [Axis]: Fairway Group Holdings Corp 1                              
Fair Value 0.0             $ 0.7             0.0
Investment, Identifier [Axis]: Fairway Group Holdings Corp 2                              
Fair Value 0.0             0.0             0.0
Investment, Identifier [Axis]: Fairway Group Holdings Corp 3                              
Fair Value 0.0             0.0              
Investment, Identifier [Axis]: Fairway Group Holdings Corp, Common Stock                              
Fair Value $ 0.0             $ 0.0             0.0
Investment, Identifier [Axis]: Fairway Group Holdings Corp, Common Stock, Food & Staples Retailing                              
Number of Shares | shares [23],[32],[42]               103,091 103,091 103,091 103,091 103,091 103,091 103,091  
Amortized Cost [23],[32],[42]               $ 0.0              
Fair Value [2],[23],[32],[42]               $ 0.0              
Investment, Identifier [Axis]: Fairway Group Holdings Corp, Senior Secured Loans—First Lien, Food & Staples Retailing, November 27, 2023                              
PIK Rate [20],[23],[32],[42]               12.00% 12.00% 12.00% 12.00% 12.00% 12.00% 12.00%  
Principal Amount [6],[20],[23],[32],[42]               $ 11.7              
Amortized Cost [20],[23],[32],[42]               1.0              
Fair Value [2],[20],[23],[32],[42]               $ 0.7              
Investment, Identifier [Axis]: Fairway Group Holdings Corp, Senior Secured Loans—First Lien, Food & Staples Retailing, November 27, 2023 | Maximum                              
PIK Rate [20],[23],[32],[42]               12.00% 12.00% 12.00% 12.00% 12.00% 12.00% 12.00%  
Investment, Identifier [Axis]: Fairway Group Holdings Corp, Senior Secured Loans—First Lien, Food & Staples Retailing, November 28, 2023                              
PIK Rate [20],[23],[32],[42]               10.00% 10.00% 10.00% 10.00% 10.00% 10.00% 10.00%  
Principal Amount [6],[20],[23],[32],[42]               $ 7.6              
Amortized Cost [20],[23],[32],[42]               0.0              
Fair Value [2],[20],[23],[32],[42]               $ 0.0              
Investment, Identifier [Axis]: Fairway Group Holdings Corp, Senior Secured Loans—First Lien, Food & Staples Retailing, November 28, 2023 | Maximum                              
PIK Rate [20],[23],[32],[42]               10.00% 10.00% 10.00% 10.00% 10.00% 10.00% 10.00%  
Investment, Identifier [Axis]: Follett Software Co, Senior Secured Loans—First Lien, Software & Services, August 31, 2027t 2027                              
Variable Rate [5]               5.75% 5.75% 5.75% 5.75% 5.75% 5.75% 5.75%  
Floor Rate [5]               0.80% 0.80% 0.80% 0.80% 0.80% 0.80% 0.80%  
Principal Amount [5],[6]               $ 9.9              
Amortized Cost [5]               9.9              
Fair Value [2],[5]               $ 9.8              
Investment, Identifier [Axis]: Follett Software Co, Senior Secured Loans—First Lien, Software & Services, August 31, 2028                              
Variable Rate [8],[9],[38],[43]               5.75% 5.75% 5.75% 5.75% 5.75% 5.75% 5.75%  
Floor Rate [8],[9],[38],[43]               0.80% 0.80% 0.80% 0.80% 0.80% 0.80% 0.80%  
Principal Amount [6],[8],[9],[38],[43]               $ 74.4              
Amortized Cost [8],[9],[38],[43]               73.7              
Fair Value [2],[8],[9],[38],[43]               $ 74.1              
Investment, Identifier [Axis]: Follett Software Co, Software & Services 1                              
Variable Rate [12],[13],[14],[18],[19] 5.75% 5.75% 5.75% 5.75% 5.75% 5.75% 5.75%                
Floor Rate [13],[14],[18],[19] 0.80% 0.80% 0.80% 0.80% 0.80% 0.80% 0.80%                
Principal Amount [13],[14],[17],[18],[19] $ 73.7                            
Amortized Cost [13],[14],[18],[19] 73.1                            
Fair Value [3],[13],[14],[18],[19] $ 72.1                            
Investment, Identifier [Axis]: Follett Software Co, Software & Services 2                              
Variable Rate [4],[12] 5.75% 5.75% 5.75% 5.75% 5.75% 5.75% 5.75%                
Floor Rate [4] 0.80% 0.80% 0.80% 0.80% 0.80% 0.80% 0.80%                
Principal Amount [4],[17] $ 9.9                            
Amortized Cost [4] 9.9                            
Fair Value [3],[4] $ 9.7                            
Investment, Identifier [Axis]: Foundation Consumer Brands LLC, Pharmaceuticals, Biotechnology & Life Sciences 1                              
Variable Rate [12],[15],[40] 5.50% 5.50% 5.50% 5.50% 5.50% 5.50% 5.50%                
Floor Rate [15],[18],[40] 1.00% 1.00% 1.00% 1.00% 1.00% 1.00% 1.00%                
Principal Amount [15],[17],[18],[40] $ 83.9                            
Amortized Cost [15],[18],[40] 80.5                            
Fair Value [3],[15],[18],[40] $ 84.7                            
Investment, Identifier [Axis]: Foundation Consumer Brands LLC, Pharmaceuticals, Biotechnology & Life Sciences 2                              
Variable Rate [4],[12] 5.50% 5.50% 5.50% 5.50% 5.50% 5.50% 5.50%                
Floor Rate [4] 1.00% 1.00% 1.00% 1.00% 1.00% 1.00% 1.00%                
Principal Amount [4],[17] $ 6.6                            
Amortized Cost [4] 6.6                            
Fair Value [3],[4] $ 6.6                            
Investment, Identifier [Axis]: Foundation Consumer Brands LLC, Senior Secured Loans—First Lien, Pharmaceuticals, Biotechnology & Life Sciences, February 12, 2027 -1                              
Variable Rate [32],[39]               6.38% 6.38% 6.38% 6.38% 6.38% 6.38% 6.38%  
Floor Rate [32],[39]               1.00% 1.00% 1.00% 1.00% 1.00% 1.00% 1.00%  
Principal Amount [6],[32],[39]               $ 97.1              
Amortized Cost [32],[39]               93.0              
Fair Value [2],[32],[39]               $ 98.0              
Investment, Identifier [Axis]: Foundation Consumer Brands LLC, Senior Secured Loans—First Lien, Pharmaceuticals, Biotechnology & Life Sciences, February 12, 2027 -2                              
Variable Rate [5]               6.38% 6.38% 6.38% 6.38% 6.38% 6.38% 6.38%  
Floor Rate [5]               1.00% 1.00% 1.00% 1.00% 1.00% 1.00% 1.00%  
Principal Amount [5],[6]               $ 6.6              
Amortized Cost [5]               6.6              
Fair Value [2],[5]               $ 6.6              
Investment, Identifier [Axis]: Foundation Risk Partners Corp, Insurance 1                              
Variable Rate [12],[15] 6.25% 6.25% 6.25% 6.25% 6.25% 6.25% 6.25%                
Floor Rate [15] 0.80% 0.80% 0.80% 0.80% 0.80% 0.80% 0.80%                
Principal Amount [15],[17] $ 2.9                            
Amortized Cost [15] 2.8                            
Fair Value [3],[15] $ 2.8                            
Investment, Identifier [Axis]: Foundation Risk Partners Corp, Insurance 2                              
Variable Rate [12],[15] 6.00% 6.00% 6.00% 6.00% 6.00% 6.00% 6.00%                
Floor Rate [15],[40] 0.80% 0.80% 0.80% 0.80% 0.80% 0.80% 0.80%                
Principal Amount [15],[17],[40] $ 79.9                            
Amortized Cost [15],[40] 78.8                            
Fair Value [3],[15],[40] $ 78.1                            
Investment, Identifier [Axis]: Foundation Risk Partners Corp, Insurance 3                              
Variable Rate [4],[12] 6.25% 6.25% 6.25% 6.25% 6.25% 6.25% 6.25%                
Floor Rate [4] 0.80% 0.80% 0.80% 0.80% 0.80% 0.80% 0.80%                
Principal Amount [4],[17] $ 4.1                            
Amortized Cost [4] 4.1                            
Fair Value [3],[4] $ 4.0                            
Investment, Identifier [Axis]: Foundation Risk Partners Corp, Senior Secured Loans—First Lien, Insurance, Maturing October 29, 2027                              
Variable Rate [5]               5.75% 5.75% 5.75% 5.75% 5.75% 5.75% 5.75%  
Floor Rate [5]               0.80% 0.80% 0.80% 0.80% 0.80% 0.80% 0.80%  
Principal Amount [5],[6]               $ 7.0              
Amortized Cost [5]               6.9              
Fair Value [2],[5]               $ 6.9              
Investment, Identifier [Axis]: Foundation Risk Partners Corp, Senior Secured Loans—First Lien, Insurance, Maturing October 29, 2028 -1                              
Variable Rate [32]               5.75% 5.75% 5.75% 5.75% 5.75% 5.75% 5.75%  
Floor Rate [32]               0.80% 0.80% 0.80% 0.80% 0.80% 0.80% 0.80%  
Principal Amount [6],[32]               $ 74.3              
Amortized Cost [32]               73.2              
Fair Value [2],[32]               $ 73.3              
Investment, Identifier [Axis]: Foundation Risk Partners Corp, Senior Secured Loans—First Lien, Insurance, Maturing October 29, 2028 -2                              
Variable Rate [5]               5.75% 5.75% 5.75% 5.75% 5.75% 5.75% 5.75%  
Floor Rate [5]               0.80% 0.80% 0.80% 0.80% 0.80% 0.80% 0.80%  
Principal Amount [5],[6]               $ 6.2              
Amortized Cost [5]               6.2              
Fair Value [2],[5]               $ 6.1              
Investment, Identifier [Axis]: Fox Head Inc, Common Stock, Consumer Durables & Apparel                              
Number of Shares | shares 10,000,000 [15],[54] 10,000,000 [15],[54] 10,000,000 [15],[54] 10,000,000 [15],[54] 10,000,000 [15],[54] 10,000,000 [15],[54] 10,000,000 [15],[54] 10,000,000 [11],[23],[32] 10,000,000 [11],[23],[32] 10,000,000 [11],[23],[32] 10,000,000 [11],[23],[32] 10,000,000 [11],[23],[32] 10,000,000 [11],[23],[32] 10,000,000 [11],[23],[32]  
Amortized Cost $ 2.9 [15],[54]             $ 8.0 [11],[23],[32]              
Fair Value 0.0 [1],[15],[54]             $ 10.9 [2],[11],[23],[32]              
Investment, Identifier [Axis]: Frontline Technologies Group LLC, Senior Secured Loans—First Lien, Software & Services -1                              
Variable Rate [10],[32],[39]               5.25% 5.25% 5.25% 5.25% 5.25% 5.25% 5.25%  
Floor Rate [10],[32],[39]               1.00% 1.00% 1.00% 1.00% 1.00% 1.00% 1.00%  
Principal Amount [6],[10],[32],[39]               $ 78.7              
Amortized Cost [10],[32],[39]               78.1              
Fair Value [2],[10],[32],[39]               $ 78.7              
Investment, Identifier [Axis]: Frontline Technologies Group LLC, Senior Secured Loans—First Lien, Software & Services -2                              
Variable Rate [32],[33]               5.25% 5.25% 5.25% 5.25% 5.25% 5.25% 5.25%  
Floor Rate [32],[33]               1.00% 1.00% 1.00% 1.00% 1.00% 1.00% 1.00%  
Principal Amount [6],[32],[33]               $ 75.6              
Amortized Cost [32],[33]               71.7              
Fair Value [2],[32],[33]               76.2              
Investment, Identifier [Axis]: Fronton BV, Common Stock                              
Fair Value $ 1.0             $ 1.4             1.2
Investment, Identifier [Axis]: Fronton BV, Common Stock, Consumer Services                              
Number of Shares | shares 14,943 [28],[41],[55] 14,943 [28],[41],[55] 14,943 [28],[41],[55] 14,943 [28],[41],[55] 14,943 [28],[41],[55] 14,943 [28],[41],[55] 14,943 [28],[41],[55] 14,943 [23],[42],[56] 14,943 [23],[42],[56] 14,943 [23],[42],[56] 14,943 [23],[42],[56] 14,943 [23],[42],[56] 14,943 [23],[42],[56] 14,943 [23],[42],[56]  
Amortized Cost $ 0.0 [28],[41],[55]             $ 0.0 [23],[42],[56]              
Fair Value $ 1.0 [1],[28],[41],[55]             $ 1.4 [2],[23],[42],[56]              
Investment, Identifier [Axis]: Galaxy Universal LLC                              
Variable Rate [32]               5.00% 5.00% 5.00% 5.00% 5.00% 5.00% 5.00%  
Floor Rate [32]               1.00% 1.00% 1.00% 1.00% 1.00% 1.00% 1.00%  
Principal Amount [6],[32]               $ 36.2              
Amortized Cost [32]               35.8              
Fair Value [2],[32]               $ 35.8              
Investment, Identifier [Axis]: Galaxy Universal LLC, Common Stock, Consumer Durables & Apparel                              
Number of Shares | shares 228,806 [28],[51] 228,806 [28],[51] 228,806 [28],[51] 228,806 [28],[51] 228,806 [28],[51] 228,806 [28],[51] 228,806 [28],[51] 228,806 [23],[32] 228,806 [23],[32] 228,806 [23],[32] 228,806 [23],[32] 228,806 [23],[32] 228,806 [23],[32] 228,806 [23],[32]  
Amortized Cost $ 35.4 [28],[51]             $ 35.5 [23],[32]              
Fair Value $ 7.5 [1],[28],[51]             $ 35.5 [2],[23],[32]              
Investment, Identifier [Axis]: Galaxy Universal LLC, Consumer Durables & Apparel 1                              
Variable Rate [12],[15] 5.75% 5.75% 5.75% 5.75% 5.75% 5.75% 5.75%                
Floor Rate [15] 1.00% 1.00% 1.00% 1.00% 1.00% 1.00% 1.00%                
Principal Amount [15],[17] $ 7.5                            
Amortized Cost [15] 7.5                            
Fair Value [3],[15] $ 7.5                            
Investment, Identifier [Axis]: Galaxy Universal LLC, Consumer Durables & Apparel 2                              
Variable Rate [12],[15] 5.75% 5.75% 5.75% 5.75% 5.75% 5.75% 5.75%                
Floor Rate [15] 1.00% 1.00% 1.00% 1.00% 1.00% 1.00% 1.00%                
Principal Amount [15],[17] $ 88.0                            
Amortized Cost [15] 88.0                            
Fair Value [3],[15] $ 85.3                            
Investment, Identifier [Axis]: Galaxy Universal LLC, Consumer Durables & Apparel 3                              
Variable Rate [12],[15] 5.00% 5.00% 5.00% 5.00% 5.00% 5.00% 5.00%                
Floor Rate [15] 1.00% 1.00% 1.00% 1.00% 1.00% 1.00% 1.00%                
Principal Amount [15],[17] $ 21.5                            
Amortized Cost [15] 21.4                            
Fair Value [3],[15] $ 21.2                            
Investment, Identifier [Axis]: Galaxy Universal LLC, Senior Secured Loans—First Lien, Consumer Durables & Apparel, Maturing February 4,2022 -1                              
Variable Rate [32]               5.75% 5.75% 5.75% 5.75% 5.75% 5.75% 5.75%  
Floor Rate [32]               1.00% 1.00% 1.00% 1.00% 1.00% 1.00% 1.00%  
Principal Amount | € [6],[32]                     € 88.9        
Amortized Cost [32]               $ 88.9              
Fair Value [2],[32]               $ 88.9              
Investment, Identifier [Axis]: Galaxy Universal LLC, Senior Secured Loans—First Lien, Consumer Durables & Apparel, Maturing February 4,2022 -2                              
Rate [5]               5.00% 5.00% 5.00% 5.00% 5.00% 5.00% 5.00%  
Principal Amount [5],[6]               $ 7.7              
Amortized Cost [5]               7.7              
Fair Value [2],[5]               $ 7.7              
Investment, Identifier [Axis]: Galaxy Universal LLC, Senior Secured Loans—First Lien, Consumer Durables & Apparel, November 1, 2026                              
Rate [32]               5.00% 5.00% 5.00% 5.00% 5.00% 5.00% 5.00%  
Principal Amount [6],[32]               $ 0.9              
Amortized Cost [32]               0.9              
Fair Value [2],[32]               $ 0.9              
Investment, Identifier [Axis]: Galaxy Universal LLC, Trade Claim, Consumer Durables & Apparel                              
Number of Shares | shares 7,701,195 [15],[28] 7,701,195 [15],[28] 7,701,195 [15],[28] 7,701,195 [15],[28] 7,701,195 [15],[28] 7,701,195 [15],[28] 7,701,195 [15],[28] 27,256,114 [23],[32] 27,256,114 [23],[32] 27,256,114 [23],[32] 27,256,114 [23],[32] 27,256,114 [23],[32] 27,256,114 [23],[32] 27,256,114 [23],[32]  
Amortized Cost $ 4.6 [15],[28]             $ 16.4 [23],[32]              
Fair Value $ 1.7 [1],[15],[28]             $ 16.4 [2],[23],[32]              
Investment, Identifier [Axis]: Galway Partners Holdings LLC, Insurance 1                              
Variable Rate [12],[13],[14],[15],[19],[40] 5.25% 5.25% 5.25% 5.25% 5.25% 5.25% 5.25%                
PIK Rate [12],[13],[14],[15],[19],[40] 0.00% 0.00% 0.00% 0.00% 0.00% 0.00% 0.00%                
Floor Rate [13],[14],[15],[19],[40] 0.80% 0.80% 0.80% 0.80% 0.80% 0.80% 0.80%                
Principal Amount [13],[14],[15],[17],[19],[40] $ 111.1                            
Amortized Cost [13],[14],[15],[19],[40] 109.4                            
Fair Value [3],[13],[14],[15],[19],[40] $ 109.7                            
Investment, Identifier [Axis]: Galway Partners Holdings LLC, Insurance 1 | Maximum                              
PIK Rate [12],[13],[14],[15],[19],[40] 1.30% 1.30% 1.30% 1.30% 1.30% 1.30% 1.30%                
Investment, Identifier [Axis]: Galway Partners Holdings LLC, Insurance 2                              
Variable Rate [4],[12] 5.25% 5.25% 5.25% 5.25% 5.25% 5.25% 5.25%                
PIK Rate [4],[12] 0.00% 0.00% 0.00% 0.00% 0.00% 0.00% 0.00%                
Floor Rate [4] 0.80% 0.80% 0.80% 0.80% 0.80% 0.80% 0.80%                
Principal Amount [4],[17] $ 12.0                            
Amortized Cost [4] 11.8                            
Fair Value [3],[4] $ 11.8                            
Investment, Identifier [Axis]: Galway Partners Holdings LLC, Insurance 2 | Maximum                              
PIK Rate [4],[12] 1.30% 1.30% 1.30% 1.30% 1.30% 1.30% 1.30%                
Investment, Identifier [Axis]: Galway Partners Holdings LLC, Insurance 3                              
Variable Rate [4],[12] 5.25% 5.25% 5.25% 5.25% 5.25% 5.25% 5.25%                
PIK Rate [4],[12] 0.00% 0.00% 0.00% 0.00% 0.00% 0.00% 0.00%                
Floor Rate [4] 0.80% 0.80% 0.80% 0.80% 0.80% 0.80% 0.80%                
Principal Amount [4],[17] $ 1.3                            
Amortized Cost [4] 1.3                            
Fair Value [3],[4] $ 1.3                            
Investment, Identifier [Axis]: Galway Partners Holdings LLC, Insurance 3 | Maximum                              
PIK Rate [4],[12] 1.30% 1.30% 1.30% 1.30% 1.30% 1.30% 1.30%                
Investment, Identifier [Axis]: Galway Partners Holdings LLC, Senior Secured Loans—First Lien, Insurance, Maturing September 29, 2028 -1                              
Variable Rate [8],[9],[32],[38]               5.25% 5.25% 5.25% 5.25% 5.25% 5.25% 5.25%  
PIK Rate [8],[9],[32],[38]               0.00% 0.00% 0.00% 0.00% 0.00% 0.00% 0.00%  
Floor Rate [8],[9],[32],[38]               0.80% 0.80% 0.80% 0.80% 0.80% 0.80% 0.80%  
Principal Amount [6],[8],[9],[32],[38]               $ 128.1              
Amortized Cost [8],[9],[32],[38]               125.5              
Fair Value [2],[8],[9],[32],[38]               $ 126.0              
Investment, Identifier [Axis]: Galway Partners Holdings LLC, Senior Secured Loans—First Lien, Insurance, Maturing September 29, 2028 -1 | Maximum                              
PIK Rate [8],[9],[32],[38]               1.30% 1.30% 1.30% 1.30% 1.30% 1.30% 1.30%  
Investment, Identifier [Axis]: Galway Partners Holdings LLC, Senior Secured Loans—First Lien, Insurance, Maturing September 29, 2028 -2                              
PIK Rate [5]               0.00% 0.00% 0.00% 0.00% 0.00% 0.00% 0.00%  
Floor Rate [5]               0.80% 0.80% 0.80% 0.80% 0.80% 0.80% 0.80%  
Principal Amount [5],[6]               $ 22.4              
Amortized Cost [5]               22.4              
Fair Value [2],[5]               $ 22.0              
Investment, Identifier [Axis]: Galway Partners Holdings LLC, Senior Secured Loans—First Lien, Insurance, Maturing September 29, 2028 -2 | Maximum                              
PIK Rate [5]               1.30% 1.30% 1.30% 1.30% 1.30% 1.30% 1.30%  
Investment, Identifier [Axis]: Galway Partners Holdings LLC, Senior Secured Loans—First Lien, Insurance, Maturing September 30, 2027                              
Variable Rate [5]               5.25% 5.25% 5.25% 5.25% 5.25% 5.25% 5.25%  
PIK Rate [5]               0.00% 0.00% 0.00% 0.00% 0.00% 0.00% 0.00%  
Floor Rate [5]               0.80% 0.80% 0.80% 0.80% 0.80% 0.80% 0.80%  
Principal Amount [5],[6]               $ 12.0              
Amortized Cost [5]               11.7              
Fair Value [2],[5]               $ 11.8              
Investment, Identifier [Axis]: Galway Partners Holdings LLC, Senior Secured Loans—First Lien, Insurance, Maturing September 30, 2027 | Maximum                              
PIK Rate [5]               1.30% 1.30% 1.30% 1.30% 1.30% 1.30% 1.30%  
Investment, Identifier [Axis]: General Datatech LP                              
Variable Rate [8],[9],[32],[38],[39],[43]               6.25% 6.25% 6.25% 6.25% 6.25% 6.25% 6.25%  
Floor Rate [8],[9],[32],[38],[39],[43]               1.00% 1.00% 1.00% 1.00% 1.00% 1.00% 1.00%  
Principal Amount [6],[8],[9],[32],[38],[39],[43]               $ 169.1              
Amortized Cost [8],[9],[32],[38],[39],[43]               167.5              
Fair Value [2],[8],[9],[32],[38],[39],[43]               $ 166.5              
Investment, Identifier [Axis]: General Datatech LP, Software & Services                              
Variable Rate [12],[13],[14],[15],[18],[19],[40] 6.25% 6.25% 6.25% 6.25% 6.25% 6.25% 6.25%                
Floor Rate [13],[14],[15],[18],[19],[40] 1.00% 1.00% 1.00% 1.00% 1.00% 1.00% 1.00%                
Principal Amount [13],[14],[15],[17],[18],[19],[40] $ 156.4                            
Amortized Cost [13],[14],[15],[18],[19],[40] 155.1                            
Fair Value [3],[13],[14],[15],[18],[19],[40] $ 146.5                            
Investment, Identifier [Axis]: Genesys Telecommunications Laboratories Inc, Class A Shares, Technology Hardware & Equipment                              
Number of Shares | shares 40,529 [15],[28] 40,529 [15],[28] 40,529 [15],[28] 40,529 [15],[28] 40,529 [15],[28] 40,529 [15],[28] 40,529 [15],[28] 40,529 [23],[32] 40,529 [23],[32] 40,529 [23],[32] 40,529 [23],[32] 40,529 [23],[32] 40,529 [23],[32] 40,529 [23],[32]  
Amortized Cost $ 0.0 [15],[28]             $ 0.0 [23],[32]              
Fair Value $ 0.0 [1],[15],[28]             $ 0.0 [2],[23],[32]              
Investment, Identifier [Axis]: Genesys Telecommunications Laboratories Inc, Ordinary Shares, Technology Hardware & Equipment                              
Number of Shares | shares 41,339 [15],[28] 41,339 [15],[28] 41,339 [15],[28] 41,339 [15],[28] 41,339 [15],[28] 41,339 [15],[28] 41,339 [15],[28] 41,339 [23],[32] 41,339 [23],[32] 41,339 [23],[32] 41,339 [23],[32] 41,339 [23],[32] 41,339 [23],[32] 41,339 [23],[32]  
Amortized Cost $ 0.0 [15],[28]             $ 0.0 [23],[32]              
Fair Value $ 0.0 [1],[15],[28]             $ 0.0 [2],[23],[32]              
Investment, Identifier [Axis]: Genesys Telecommunications Laboratories Inc, Preferred Stock, Technology Hardware & Equipment                              
Number of Shares | shares 1,050,465 [15],[28] 1,050,465 [15],[28] 1,050,465 [15],[28] 1,050,465 [15],[28] 1,050,465 [15],[28] 1,050,465 [15],[28] 1,050,465 [15],[28] 1,050,465 [23],[32] 1,050,465 [23],[32] 1,050,465 [23],[32] 1,050,465 [23],[32] 1,050,465 [23],[32] 1,050,465 [23],[32] 1,050,465 [23],[32]  
Amortized Cost $ 0.0 [15],[28]             $ 0.0 [23],[32]              
Fair Value $ 0.0 [1],[15],[28]             $ 0.0 [2],[23],[32]              
Investment, Identifier [Axis]: Gigamon Inc, Software & Services 1                              
Variable Rate [12],[15] 5.75% 5.75% 5.75% 5.75% 5.75% 5.75% 5.75%                
Floor Rate [15] 0.80% 0.80% 0.80% 0.80% 0.80% 0.80% 0.80%                
Principal Amount [15],[17] $ 170.4                            
Amortized Cost [15] 168.9                            
Fair Value [3],[15] $ 163.2                            
Investment, Identifier [Axis]: Gigamon Inc, Software & Services 2                              
Variable Rate [12] 5.75% 5.75% 5.75% 5.75% 5.75% 5.75% 5.75%                
Floor Rate [4] 0.80% 0.80% 0.80% 0.80% 0.80% 0.80% 0.80%                
Principal Amount [4],[17] $ 9.3                            
Amortized Cost [4] 9.3                            
Fair Value [3],[4] $ 8.9                            
Investment, Identifier [Axis]: Global Jet Capital LLC, Preferred Stock, Commercial & Professional Services 1                              
Number of Shares | shares 149,494,590 [15],[28],[53],[54] 149,494,590 [15],[28],[53],[54] 149,494,590 [15],[28],[53],[54] 149,494,590 [15],[28],[53],[54] 149,494,590 [15],[28],[53],[54] 149,494,590 [15],[28],[53],[54] 149,494,590 [15],[28],[53],[54] 149,494,590 [6],[24],[32] 149,494,590 [6],[24],[32] 149,494,590 [6],[24],[32] 149,494,590 [6],[24],[32] 149,494,590 [6],[24],[32] 149,494,590 [6],[24],[32] 149,494,590 [6],[24],[32]  
Amortized Cost $ 69.4 [15],[28],[53],[54]             $ 69.4 [24],[32]              
Fair Value $ 0.0 [3],[15],[28],[53],[54]             $ 0.0 [2],[24],[32]              
Investment, Identifier [Axis]: Global Jet Capital LLC, Preferred Stock, Commercial & Professional Services 2                              
PIK Rate 9.00% [12],[15],[25],[28],[53],[54] 9.00% [12],[15],[25],[28],[53],[54] 9.00% [12],[15],[25],[28],[53],[54] 9.00% [12],[15],[25],[28],[53],[54] 9.00% [12],[15],[25],[28],[53],[54] 9.00% [12],[15],[25],[28],[53],[54] 9.00% [12],[15],[25],[28],[53],[54] 9.00% [7],[11],[32],[52] 9.00% [7],[11],[32],[52] 9.00% [7],[11],[32],[52] 9.00% [7],[11],[32],[52] 9.00% [7],[11],[32],[52] 9.00% [7],[11],[32],[52] 9.00% [7],[11],[32],[52]  
Principal Amount $ 453.1 [15],[17],[25],[28],[53],[54]             $ 414.0 [6],[11],[32],[52]              
Amortized Cost 309.4 [15],[25],[28],[53],[54]             304.8 [11],[32],[52]              
Fair Value $ 232.2 [3],[15],[25],[28],[53],[54]             $ 302.2 [2],[11],[32],[52]              
Investment, Identifier [Axis]: Global Jet Capital LLC, Preferred Stock, Commercial & Professional Services 2 | Maximum                              
PIK Rate 9.00% [12],[15],[25],[28],[53],[54] 9.00% [12],[15],[25],[28],[53],[54] 9.00% [12],[15],[25],[28],[53],[54] 9.00% [12],[15],[25],[28],[53],[54] 9.00% [12],[15],[25],[28],[53],[54] 9.00% [12],[15],[25],[28],[53],[54] 9.00% [12],[15],[25],[28],[53],[54] 9.00% [7],[11],[32],[52] 9.00% [7],[11],[32],[52] 9.00% [7],[11],[32],[52] 9.00% [7],[11],[32],[52] 9.00% [7],[11],[32],[52] 9.00% [7],[11],[32],[52] 9.00% [7],[11],[32],[52]  
Investment, Identifier [Axis]: Global Jet Capital LLC, Structured Mezzanine, Commercial & Professional Services 1                              
PIK Rate 15.00% [12],[15],[29],[53],[54] 15.00% [12],[15],[29],[53],[54] 15.00% [12],[15],[29],[53],[54] 15.00% [12],[15],[29],[53],[54] 15.00% [12],[15],[29],[53],[54] 15.00% [12],[15],[29],[53],[54] 15.00% [12],[15],[29],[53],[54] 15.00% [7],[11],[24],[32],[52] 15.00% [7],[11],[24],[32],[52] 15.00% [7],[11],[24],[32],[52] 15.00% [7],[11],[24],[32],[52] 15.00% [7],[11],[24],[32],[52] 15.00% [7],[11],[24],[32],[52] 15.00% [7],[11],[24],[32],[52]  
Principal Amount $ 28.0 [15],[17],[29],[53],[54]             $ 53.6 [6],[11],[24],[32],[52]              
Amortized Cost 21.2 [15],[29],[53],[54]             36.9 [11],[24],[32],[52]              
Fair Value $ 28.0 [3],[15],[29],[53],[54]             $ 53.6 [2],[11],[24],[32],[52]              
Investment, Identifier [Axis]: Global Jet Capital LLC, Structured Mezzanine, Commercial & Professional Services 1 | Maximum                              
PIK Rate 15.00% [12],[15],[29],[53],[54] 15.00% [12],[15],[29],[53],[54] 15.00% [12],[15],[29],[53],[54] 15.00% [12],[15],[29],[53],[54] 15.00% [12],[15],[29],[53],[54] 15.00% [12],[15],[29],[53],[54] 15.00% [12],[15],[29],[53],[54] 15.00% [7],[11],[24],[32],[52] 15.00% [7],[11],[24],[32],[52] 15.00% [7],[11],[24],[32],[52] 15.00% [7],[11],[24],[32],[52] 15.00% [7],[11],[24],[32],[52] 15.00% [7],[11],[24],[32],[52] 15.00% [7],[11],[24],[32],[52]  
Investment, Identifier [Axis]: Global Jet Capital LLC, Structured Mezzanine, Commercial & Professional Services 2                              
PIK Rate 15.00% [12],[15],[29],[53],[54] 15.00% [12],[15],[29],[53],[54] 15.00% [12],[15],[29],[53],[54] 15.00% [12],[15],[29],[53],[54] 15.00% [12],[15],[29],[53],[54] 15.00% [12],[15],[29],[53],[54] 15.00% [12],[15],[29],[53],[54] 15.00% [7],[11],[24],[32],[52] 15.00% [7],[11],[24],[32],[52] 15.00% [7],[11],[24],[32],[52] 15.00% [7],[11],[24],[32],[52] 15.00% [7],[11],[24],[32],[52] 15.00% [7],[11],[24],[32],[52] 15.00% [7],[11],[24],[32],[52]  
Principal Amount $ 20.5 [15],[17],[29],[53],[54]             $ 39.2 [6],[11],[24],[32],[52]              
Amortized Cost 15.1 [15],[29],[53],[54]             26.9 [11],[24],[32],[52]              
Fair Value $ 20.5 [3],[15],[29],[53],[54]             $ 39.2 [2],[11],[24],[32],[52]              
Investment, Identifier [Axis]: Global Jet Capital LLC, Structured Mezzanine, Commercial & Professional Services 2 | Maximum                              
PIK Rate 15.00% [12],[15],[29],[53],[54] 15.00% [12],[15],[29],[53],[54] 15.00% [12],[15],[29],[53],[54] 15.00% [12],[15],[29],[53],[54] 15.00% [12],[15],[29],[53],[54] 15.00% [12],[15],[29],[53],[54] 15.00% [12],[15],[29],[53],[54] 15.00% [7],[11],[24],[32],[52] 15.00% [7],[11],[24],[32],[52] 15.00% [7],[11],[24],[32],[52] 15.00% [7],[11],[24],[32],[52] 15.00% [7],[11],[24],[32],[52] 15.00% [7],[11],[24],[32],[52] 15.00% [7],[11],[24],[32],[52]  
Investment, Identifier [Axis]: Global Jet Capital LLC, Structured Mezzanine, Commercial & Professional Services 3                              
PIK Rate 15.00% [12],[15],[29],[53],[54] 15.00% [12],[15],[29],[53],[54] 15.00% [12],[15],[29],[53],[54] 15.00% [12],[15],[29],[53],[54] 15.00% [12],[15],[29],[53],[54] 15.00% [12],[15],[29],[53],[54] 15.00% [12],[15],[29],[53],[54] 15.00% [7],[11],[24],[32],[52] 15.00% [7],[11],[24],[32],[52] 15.00% [7],[11],[24],[32],[52] 15.00% [7],[11],[24],[32],[52] 15.00% [7],[11],[24],[32],[52] 15.00% [7],[11],[24],[32],[52] 15.00% [7],[11],[24],[32],[52]  
Principal Amount $ 2.4 [15],[17],[29],[53],[54]             $ 4.6 [6],[11],[24],[32],[52]              
Amortized Cost 1.7 [15],[29],[53],[54]             3.1 [11],[24],[32],[52]              
Fair Value $ 2.4 [3],[15],[29],[53],[54]             $ 4.6 [2],[11],[24],[32],[52]              
Investment, Identifier [Axis]: Global Jet Capital LLC, Structured Mezzanine, Commercial & Professional Services 3 | Maximum                              
PIK Rate 15.00% [12],[15],[29],[53],[54] 15.00% [12],[15],[29],[53],[54] 15.00% [12],[15],[29],[53],[54] 15.00% [12],[15],[29],[53],[54] 15.00% [12],[15],[29],[53],[54] 15.00% [12],[15],[29],[53],[54] 15.00% [12],[15],[29],[53],[54] 15.00% [7],[11],[24],[32],[52] 15.00% [7],[11],[24],[32],[52] 15.00% [7],[11],[24],[32],[52] 15.00% [7],[11],[24],[32],[52] 15.00% [7],[11],[24],[32],[52] 15.00% [7],[11],[24],[32],[52] 15.00% [7],[11],[24],[32],[52]  
Investment, Identifier [Axis]: Global Lending Services LLC, Private Equity, Diversified Financials 1                              
Number of Shares | shares 7,391,109 [15],[29] 7,391,109 [15],[29] 7,391,109 [15],[29] 7,391,109 [15],[29] 7,391,109 [15],[29] 7,391,109 [15],[29] 7,391,109 [15],[29] 12,222,437 [6],[24],[32] 12,222,437 [6],[24],[32] 12,222,437 [6],[24],[32] 12,222,437 [6],[24],[32] 12,222,437 [6],[24],[32] 12,222,437 [6],[24],[32] 12,222,437 [6],[24],[32]  
Amortized Cost $ 8.6 [15],[29]             $ 14.2 [24],[32]              
Fair Value $ 8.2 [3],[15],[29]             $ 15.5 [2],[24],[32]              
Investment, Identifier [Axis]: Global Lending Services LLC, Private Equity, Diversified Financials 2                              
Number of Shares | shares 10,356,657 [15],[29] 10,356,657 [15],[29] 10,356,657 [15],[29] 10,356,657 [15],[29] 10,356,657 [15],[29] 10,356,657 [15],[29] 10,356,657 [15],[29] 22,352,639 [6],[24],[32] 22,352,639 [6],[24],[32] 22,352,639 [6],[24],[32] 22,352,639 [6],[24],[32] 22,352,639 [6],[24],[32] 22,352,639 [6],[24],[32] 22,352,639 [6],[24],[32]  
Amortized Cost $ 10.4 [15],[29]             $ 24.2 [24],[32]              
Fair Value $ 10.9 [3],[15],[29]             $ 28.5 [2],[24],[32]              
Investment, Identifier [Axis]: Global Lending Services LLC, Private Equity, Diversified Financials 3                              
Number of Shares | shares [15],[28],[29] 9,963,808 9,963,808 9,963,808 9,963,808 9,963,808 9,963,808 9,963,808                
Amortized Cost [15],[28],[29] $ 10.0                            
Fair Value [3],[15],[28],[29] $ 10.0                            
Investment, Identifier [Axis]: Gracent LLC, Health Care Equipment & Services 1                              
Variable Rate [12],[15] 5.50% 5.50% 5.50% 5.50% 5.50% 5.50% 5.50%                
Floor Rate 1.00% 1.00% 1.00% 1.00% 1.00% 1.00% 1.00%                
Principal Amount [15],[17] $ 25.9                            
Amortized Cost [15] 26.6                            
Fair Value [3],[15] $ 22.1                            
Investment, Identifier [Axis]: Gracent LLC, Health Care Equipment & Services 2                              
PIK Rate [12],[15] 12.00% 12.00% 12.00% 12.00% 12.00% 12.00% 12.00%                
Principal Amount [15],[17],[25],[28] $ 22.9                            
Amortized Cost [15],[25],[28] 22.6                            
Fair Value [3],[15],[25],[28] $ 11.4                            
Investment, Identifier [Axis]: Gracent LLC, Health Care Equipment & Services 2 | Maximum                              
PIK Rate [12],[15] 12.00% 12.00% 12.00% 12.00% 12.00% 12.00% 12.00%                
Investment, Identifier [Axis]: Gracent LLC, NP-1 Common Stock, Health Care Equipment & Services                              
Number of Shares | shares [28],[51] 1,000,000 1,000,000 1,000,000 1,000,000 1,000,000 1,000,000 1,000,000                
Amortized Cost [28],[51] $ 4.2                            
Fair Value [1],[28],[51] $ 0.0                            
Investment, Identifier [Axis]: Greystone Equity Member Corp                              
Variable Rate [24],[32]               7.25% 7.25% 7.25% 7.25% 7.25% 7.25% 7.25%  
Floor Rate [24],[32]               3.80% 3.80% 3.80% 3.80% 3.80% 3.80% 3.80%  
Principal Amount [6],[24],[32]               $ 194.8              
Amortized Cost [24],[32]               182.7              
Fair Value [2],[24],[32]               192.6              
Investment, Identifier [Axis]: Greystone Equity Member Corp, Diversified Financials                              
Variable Rate [12],[15],[29] 7.25% 7.25% 7.25% 7.25% 7.25% 7.25% 7.25%                
Floor Rate [15],[29] 3.80% 3.80% 3.80% 3.80% 3.80% 3.80% 3.80%                
Principal Amount [15],[17],[29] $ 194.8                            
Amortized Cost [15],[29] 185.0                            
Fair Value [3],[15],[29] $ 188.7                            
Investment, Identifier [Axis]: HKA, Commercial & Professional Services 1                              
Variable Rate [12],[15],[29] 5.75% 5.75% 5.75% 5.75% 5.75% 5.75% 5.75%                
PIK Rate [12],[15],[29] 0.00% 0.00% 0.00% 0.00% 0.00% 0.00% 0.00%                
Floor Rate [15],[29] 0.50% 0.50% 0.50% 0.50% 0.50% 0.50% 0.50%                
Principal Amount [15],[17],[29] $ 4.4                            
Amortized Cost [15],[29] 4.3                            
Fair Value [3],[15],[29] $ 4.2                            
Investment, Identifier [Axis]: HKA, Commercial & Professional Services 1 | Maximum                              
PIK Rate [12],[15],[29] 1.80% 1.80% 1.80% 1.80% 1.80% 1.80% 1.80%                
Investment, Identifier [Axis]: HKA, Commercial & Professional Services 2                              
Variable Rate [4],[12],[29] 5.75% 5.75% 5.75% 5.75% 5.75% 5.75% 5.75%                
PIK Rate [4],[12],[29] 0.00% 0.00% 0.00% 0.00% 0.00% 0.00% 0.00%                
Floor Rate [4],[29] 0.50% 0.50% 0.50% 0.50% 0.50% 0.50% 0.50%                
Principal Amount [4],[17],[29] $ 0.2                            
Amortized Cost [4],[29] 0.2                            
Fair Value [3],[4],[29] $ 0.2                            
Investment, Identifier [Axis]: HKA, Commercial & Professional Services 2 | Maximum                              
PIK Rate [4],[12],[29] 1.80% 1.80% 1.80% 1.80% 1.80% 1.80% 1.80%                
Investment, Identifier [Axis]: HM Dunn Co Inc 1                              
Fair Value $ 35.6             33.6 [57]             0.0 [57]
Investment, Identifier [Axis]: HM Dunn Co Inc 2                              
Fair Value $ 0.0             2.0 [57]             0.0 [57]
Investment, Identifier [Axis]: HM Dunn Co Inc 3                              
Fair Value [58]               0.0             0.3
Investment, Identifier [Axis]: HM Dunn Co Inc 4                              
Fair Value [58]               0.0             0.2
Investment, Identifier [Axis]: HM Dunn Co Inc, Capital Goods 1                              
Variable Rate [12] 6.00% 6.00% 6.00% 6.00% 6.00% 6.00% 6.00%                
PIK Rate [12],[15],[30] 0.00% 0.00% 0.00% 0.00% 0.00% 0.00% 0.00%                
Floor Rate [15],[30] 1.00% 1.00% 1.00% 1.00% 1.00% 1.00% 1.00%                
Principal Amount [15],[17],[30] $ 35.6                            
Amortized Cost [15],[30] 35.6                            
Fair Value [3],[15],[30] $ 35.6                            
Investment, Identifier [Axis]: HM Dunn Co Inc, Capital Goods 1 | Maximum                              
PIK Rate [12],[15],[30] 6.00% 6.00% 6.00% 6.00% 6.00% 6.00% 6.00%                
Investment, Identifier [Axis]: HM Dunn Co Inc, Capital Goods 2                              
Variable Rate [12] 6.00% 6.00% 6.00% 6.00% 6.00% 6.00% 6.00%                
PIK Rate [4],[12],[30] 0.00% 0.00% 0.00% 0.00% 0.00% 0.00% 0.00%                
Floor Rate [4],[30] 1.00% 1.00% 1.00% 1.00% 1.00% 1.00% 1.00%                
Principal Amount [4],[17],[30] $ 2.0                            
Amortized Cost [4],[30] 2.0                            
Fair Value [3],[4],[30] $ 2.0                            
Investment, Identifier [Axis]: HM Dunn Co Inc, Capital Goods 2 | Maximum                              
PIK Rate [4],[12],[30] 6.00% 6.00% 6.00% 6.00% 6.00% 6.00% 6.00%                
Investment, Identifier [Axis]: HM Dunn Co Inc, Preferred Stock, Series A                              
Fair Value $ 16.9             7.1 [57]             0.0 [57]
Investment, Identifier [Axis]: HM Dunn Co Inc, Preferred Stock, Series A 1                              
Fair Value [58]               $ 0.0             0.0
Investment, Identifier [Axis]: HM Dunn Co Inc, Preferred Stock, Series A, Capital Goods                              
Number of Shares | shares 85,385 [15],[28],[30],[34] 85,385 [15],[28],[30],[34] 85,385 [15],[28],[30],[34] 85,385 [15],[28],[30],[34] 85,385 [15],[28],[30],[34] 85,385 [15],[28],[30],[34] 85,385 [15],[28],[30],[34] 85,385 [23],[31],[32],[33] 85,385 [23],[31],[32],[33] 85,385 [23],[31],[32],[33] 85,385 [23],[31],[32],[33] 85,385 [23],[31],[32],[33] 85,385 [23],[31],[32],[33] 85,385 [23],[31],[32],[33]  
Amortized Cost $ 7.1 [15],[28],[30],[34]             $ 7.1 [23],[31],[32],[33]              
Fair Value 16.9 [1],[15],[28],[30],[34]             7.1 [2],[23],[31],[32],[33]              
Investment, Identifier [Axis]: HM Dunn Co Inc, Preferred Stock, Series B                              
Fair Value $ 0.0             $ 0.0 [57],[58]             0.0 [57],[58]
Investment, Identifier [Axis]: HM Dunn Co Inc, Preferred Stock, Series B, Capital Goods                              
Number of Shares | shares 15,000 [15],[28],[30],[34] 15,000 [15],[28],[30],[34] 15,000 [15],[28],[30],[34] 15,000 [15],[28],[30],[34] 15,000 [15],[28],[30],[34] 15,000 [15],[28],[30],[34] 15,000 [15],[28],[30],[34] 15,000 [23],[31],[32],[33] 15,000 [23],[31],[32],[33] 15,000 [23],[31],[32],[33] 15,000 [23],[31],[32],[33] 15,000 [23],[31],[32],[33] 15,000 [23],[31],[32],[33] 15,000 [23],[31],[32],[33]  
Amortized Cost $ 0.0 [15],[28],[30],[34]             $ 0.0 [23],[31],[32],[33]              
Fair Value $ 0.0 [1],[15],[28],[30],[34]             $ 0.0 [2],[23],[31],[32],[33]              
Investment, Identifier [Axis]: HM Dunn Co Inc, Senior Secured Loans—First Lien, Capital Goods -1                              
Variable Rate [31],[32]               6.00% 6.00% 6.00% 6.00% 6.00% 6.00% 6.00%  
Floor Rate [31],[32]               1.00% 1.00% 1.00% 1.00% 1.00% 1.00% 1.00%  
Principal Amount [6],[31],[32]               $ 33.6              
Amortized Cost [31],[32]               33.6              
Fair Value [2],[31],[32]               $ 33.6              
Investment, Identifier [Axis]: HM Dunn Co Inc, Senior Secured Loans—First Lien, Capital Goods -2                              
Variable Rate [31],[32]               6.00% 6.00% 6.00% 6.00% 6.00% 6.00% 6.00%  
Floor Rate [31],[32]               1.00% 1.00% 1.00% 1.00% 1.00% 1.00% 1.00%  
Principal Amount [6],[31],[32]               $ 2.0              
Amortized Cost [31],[32]               2.0              
Fair Value [2],[31],[32]               $ 2.0              
Investment, Identifier [Axis]: Harvey Industries Inc, Common Stock, Capital Goods                              
Number of Shares | shares 5,000,000 [15],[28] 5,000,000 [15],[28] 5,000,000 [15],[28] 5,000,000 [15],[28] 5,000,000 [15],[28] 5,000,000 [15],[28] 5,000,000 [15],[28] 5,000,000 [32] 5,000,000 [32] 5,000,000 [32] 5,000,000 [32] 5,000,000 [32] 5,000,000 [32] 5,000,000 [32]  
Amortized Cost $ 2.2 [15],[28]             $ 2.2 [32]              
Fair Value $ 5.2 [1],[15],[28]             $ 3.3 [2],[32]              
Investment, Identifier [Axis]: Heniff Transportation Systems LLC, Senior Secured Loans—First Lien, Transportation, Maturing December 3 2024 -1                              
Variable Rate [32]               5.75% 5.75% 5.75% 5.75% 5.75% 5.75% 5.75%  
Floor Rate [32]               1.00% 1.00% 1.00% 1.00% 1.00% 1.00% 1.00%  
Principal Amount [6],[32]               $ 5.9              
Amortized Cost [32]               5.6              
Fair Value [2],[32]               $ 5.6              
Investment, Identifier [Axis]: Heniff Transportation Systems LLC, Senior Secured Loans—First Lien, Transportation, Maturing December 3 2024 -2                              
Variable Rate [5]               5.75% 5.75% 5.75% 5.75% 5.75% 5.75% 5.75%  
Floor Rate [5]               1.00% 1.00% 1.00% 1.00% 1.00% 1.00% 1.00%  
Principal Amount [5],[6]               $ 11.9              
Amortized Cost [5]               11.9              
Fair Value [2],[5]               $ 11.1              
Investment, Identifier [Axis]: Heniff Transportation Systems LLC, Senior Secured Loans—First Lien, Transportation, Maturing December 3 2026 -1                              
Variable Rate [8],[9],[10],[32],[39],[43]               5.75% 5.75% 5.75% 5.75% 5.75% 5.75% 5.75%  
Floor Rate [8],[9],[10],[32],[39],[43]               1.00% 1.00% 1.00% 1.00% 1.00% 1.00% 1.00%  
Principal Amount [6],[8],[9],[10],[32],[39],[43]               $ 137.7              
Amortized Cost [8],[9],[10],[32],[39],[43]               130.5              
Fair Value [2],[8],[9],[10],[32],[39],[43]               $ 128.7              
Investment, Identifier [Axis]: Heniff Transportation Systems LLC, Senior Secured Loans—First Lien, Transportation, Maturing December 3 2026 -2                              
Variable Rate [32]               6.25% 6.25% 6.25% 6.25% 6.25% 6.25% 6.25%  
Floor Rate [32]               1.00% 1.00% 1.00% 1.00% 1.00% 1.00% 1.00%  
Principal Amount [6],[32]               $ 19.4              
Amortized Cost [32]               18.6              
Fair Value [2],[32]               $ 18.5              
Investment, Identifier [Axis]: Heniff Transportation Systems LLC, Transportation 1                              
Variable Rate [12],[13],[14],[15],[16],[18],[40] 5.75% 5.75% 5.75% 5.75% 5.75% 5.75% 5.75%                
Floor Rate [13],[14],[15],[16],[18],[40] 1.00% 1.00% 1.00% 1.00% 1.00% 1.00% 1.00%                
Principal Amount [13],[14],[15],[16],[17],[18],[40] $ 135.7                            
Amortized Cost [13],[14],[15],[16],[18],[40] 129.8                            
Fair Value [3],[13],[14],[15],[16],[18],[40] $ 131.3                            
Investment, Identifier [Axis]: Heniff Transportation Systems LLC, Transportation 2                              
Variable Rate [12],[15] 6.25% 6.25% 6.25% 6.25% 6.25% 6.25% 6.25%                
Floor Rate [15] 1.00% 1.00% 1.00% 1.00% 1.00% 1.00% 1.00%                
Principal Amount [15],[17] $ 19.1                            
Amortized Cost [15] 18.4                            
Fair Value [3],[15] $ 18.5                            
Investment, Identifier [Axis]: Heniff Transportation Systems LLC, Transportation 3                              
Variable Rate [4],[12] 5.75% 5.75% 5.75% 5.75% 5.75% 5.75% 5.75%                
Floor Rate [4] 1.00% 1.00% 1.00% 1.00% 1.00% 1.00% 1.00%                
Principal Amount [4],[17] $ 17.8                            
Amortized Cost [4] 17.6                            
Fair Value [3],[4] $ 17.2                            
Investment, Identifier [Axis]: Hibu Inc, Commercial & Professional Services                              
Variable Rate [12],[13],[14],[15],[18],[19],[40] 6.25% 6.25% 6.25% 6.25% 6.25% 6.25% 6.25%                
Floor Rate [13],[14],[15],[18],[19],[40] 1.00% 1.00% 1.00% 1.00% 1.00% 1.00% 1.00%                
Principal Amount [13],[14],[15],[17],[18],[19],[40] $ 99.0                            
Amortized Cost [13],[14],[15],[18],[19],[40] 94.8                            
Fair Value [3],[13],[14],[15],[18],[19],[40] $ 99.8                            
Investment, Identifier [Axis]: Higginbotham Insurance Agency Inc, Insurance -1                              
Variable Rate [32]               5.50% 5.50% 5.50% 5.50% 5.50% 5.50% 5.50%  
Floor Rate [32]               0.80% 0.80% 0.80% 0.80% 0.80% 0.80% 0.80%  
Principal Amount [6],[32]               $ 25.3              
Amortized Cost [32]               24.6              
Fair Value [2],[32]               $ 25.8              
Investment, Identifier [Axis]: Higginbotham Insurance Agency Inc, Insurance -2                              
Variable Rate [32]               5.25% 5.25% 5.25% 5.25% 5.25% 5.25% 5.25%  
Floor Rate [32]               0.80% 0.80% 0.80% 0.80% 0.80% 0.80% 0.80%  
Principal Amount [6],[32]               $ 4.5              
Amortized Cost [32]               4.3              
Fair Value [2],[32]               $ 4.6              
Investment, Identifier [Axis]: Higginbotham Insurance Agency Inc, Insurance -3                              
Variable Rate [5]               5.25% 5.25% 5.25% 5.25% 5.25% 5.25% 5.25%  
Floor Rate [5]               0.80% 0.80% 0.80% 0.80% 0.80% 0.80% 0.80%  
Principal Amount [5],[6]               $ 32.6              
Amortized Cost [5]               32.6              
Fair Value [2],[5]               33.3              
Investment, Identifier [Axis]: Higginbotham Insurance Agency Inc, Insurance 1                              
Variable Rate [12],[15] 5.50% 5.50% 5.50% 5.50% 5.50% 5.50% 5.50%                
Floor Rate [15] 0.80% 0.80% 0.80% 0.80% 0.80% 0.80% 0.80%                
Principal Amount [15],[17] $ 4.4                            
Amortized Cost [15] 4.4                            
Fair Value [3],[15] $ 4.4                            
Investment, Identifier [Axis]: Higginbotham Insurance Agency Inc, Insurance 2                              
Variable Rate [12],[15] 5.25% 5.25% 5.25% 5.25% 5.25% 5.25% 5.25%                
Floor Rate [15] 0.80% 0.80% 0.80% 0.80% 0.80% 0.80% 0.80%                
Principal Amount [15],[17] $ 7.0                            
Amortized Cost [15] 6.6                            
Fair Value [3],[15] $ 7.0                            
Investment, Identifier [Axis]: Higginbotham Insurance Agency Inc, Insurance 3                              
Variable Rate [4],[12] 5.50% 5.50% 5.50% 5.50% 5.50% 5.50% 5.50%                
Floor Rate [4] 0.80% 0.80% 0.80% 0.80% 0.80% 0.80% 0.80%                
Principal Amount [4],[17] $ 6.0                            
Amortized Cost [4] 6.0                            
Fair Value [3],[4] 6.0                            
Investment, Identifier [Axis]: Hilding Anders 1                              
Fair Value 0.0             46.6             32.4
Investment, Identifier [Axis]: Hilding Anders 2                              
Fair Value 0.0             0.0             0.0
Investment, Identifier [Axis]: Hilding Anders 3                              
Fair Value 0.0             0.0             30.3
Investment, Identifier [Axis]: Hilding Anders, Class A Common Stock                              
Fair Value $ 0.0             $ 0.0             0.0
Investment, Identifier [Axis]: Hilding Anders, Class A Common Stock, Consumer Durables & Apparel                              
Number of Shares | shares 4,503,411 [15],[28],[29],[30] 4,503,411 [15],[28],[29],[30] 4,503,411 [15],[28],[29],[30] 4,503,411 [15],[28],[29],[30] 4,503,411 [15],[28],[29],[30] 4,503,411 [15],[28],[29],[30] 4,503,411 [15],[28],[29],[30] 4,503,411 [23],[24],[31],[32] 4,503,411 [23],[24],[31],[32] 4,503,411 [23],[24],[31],[32] 4,503,411 [23],[24],[31],[32] 4,503,411 [23],[24],[31],[32] 4,503,411 [23],[24],[31],[32] 4,503,411 [23],[24],[31],[32]  
Amortized Cost $ 0.1 [15],[28],[29],[30]             $ 0.1 [23],[24],[31],[32]              
Fair Value 0.0 [1],[15],[28],[29],[30]             0.0 [2],[23],[24],[31],[32]              
Investment, Identifier [Axis]: Hilding Anders, Class B Common Stock                              
Fair Value $ 0.0             $ 0.0             0.0
Investment, Identifier [Axis]: Hilding Anders, Class B Common Stock, Consumer Durables & Apparel                              
Number of Shares | shares 574,791 [15],[28],[29],[30] 574,791 [15],[28],[29],[30] 574,791 [15],[28],[29],[30] 574,791 [15],[28],[29],[30] 574,791 [15],[28],[29],[30] 574,791 [15],[28],[29],[30] 574,791 [15],[28],[29],[30] 574,791 [23],[24],[31],[32] 574,791 [23],[24],[31],[32] 574,791 [23],[24],[31],[32] 574,791 [23],[24],[31],[32] 574,791 [23],[24],[31],[32] 574,791 [23],[24],[31],[32] 574,791 [23],[24],[31],[32]  
Amortized Cost $ 0.0 [15],[28],[29],[30]             $ 0.0 [23],[24],[31],[32]              
Fair Value 0.0 [1],[15],[28],[29],[30]             0.0 [2],[23],[24],[31],[32]              
Investment, Identifier [Axis]: Hilding Anders, Class C Common Stock                              
Fair Value $ 0.0             $ 0.0             0.0
Investment, Identifier [Axis]: Hilding Anders, Class C Common Stock, Consumer Durables & Apparel                              
Number of Shares | shares 213,201 [15],[28],[29],[30] 213,201 [15],[28],[29],[30] 213,201 [15],[28],[29],[30] 213,201 [15],[28],[29],[30] 213,201 [15],[28],[29],[30] 213,201 [15],[28],[29],[30] 213,201 [15],[28],[29],[30] 213,201 [23],[24],[31],[32] 213,201 [23],[24],[31],[32] 213,201 [23],[24],[31],[32] 213,201 [23],[24],[31],[32] 213,201 [23],[24],[31],[32] 213,201 [23],[24],[31],[32] 213,201 [23],[24],[31],[32]  
Amortized Cost $ 0.0 [15],[28],[29],[30]             $ 0.0 [23],[24],[31],[32]              
Fair Value 0.0 [1],[15],[28],[29],[30]             0.0 [2],[23],[24],[31],[32]              
Investment, Identifier [Axis]: Hilding Anders, Consumer Durables & Apparel 1                              
Principal Amount | € [15],[17],[28],[29],[30]       € 135.2                      
Amortized Cost [15],[28],[29],[30] 26.9                            
Fair Value [3],[15],[28],[29],[30] $ 0.0                            
Investment, Identifier [Axis]: Hilding Anders, Consumer Durables & Apparel 2                              
PIK Rate [12] 13.00% 13.00% 13.00% 13.00% 13.00% 13.00% 13.00%                
Principal Amount | € [15],[17],[25],[28],[29],[30]       € 152.6                      
Amortized Cost [15],[25],[28],[29],[30] $ 99.4                            
Fair Value [3],[15],[25],[28],[29],[30] $ 0.0                            
Investment, Identifier [Axis]: Hilding Anders, Consumer Durables & Apparel 2 | Maximum                              
PIK Rate [12] 13.00% 13.00% 13.00% 13.00% 13.00% 13.00% 13.00%                
Investment, Identifier [Axis]: Hilding Anders, Equity Options                              
Fair Value $ 0.0             $ 0.0             0.0
Investment, Identifier [Axis]: Hilding Anders, Equity Options, Consumer Durables & Apparel                              
Number of Shares | shares 236,160,807 [15],[28],[29],[30] 236,160,807 [15],[28],[29],[30] 236,160,807 [15],[28],[29],[30] 236,160,807 [15],[28],[29],[30] 236,160,807 [15],[28],[29],[30] 236,160,807 [15],[28],[29],[30] 236,160,807 [15],[28],[29],[30] 236,160,807 [23],[24],[31],[32] 236,160,807 [23],[24],[31],[32] 236,160,807 [23],[24],[31],[32] 236,160,807 [23],[24],[31],[32] 236,160,807 [23],[24],[31],[32] 236,160,807 [23],[24],[31],[32] 236,160,807 [23],[24],[31],[32]  
Amortized Cost $ 15.0 [15],[28],[29],[30]             $ 15.0 [23],[24],[31],[32]              
Fair Value 0.0 [1],[15],[28],[29],[30]             $ 0.0 [2],[23],[24],[31],[32]              
Investment, Identifier [Axis]: Hilding Anders, Subordinated Debt, Consumer Durables & Apparel - 3                              
PIK Rate [20],[23],[24],[31],[32]               13.00% 13.00% 13.00% 13.00% 13.00% 13.00% 13.00%  
Principal Amount [6],[20],[23],[24],[31],[32]               $ 134.4              
Amortized Cost [20],[23],[24],[31],[32]               99.4              
Fair Value [2],[20],[23],[24],[31],[32]               $ 46.6              
Investment, Identifier [Axis]: Hilding Anders, Subordinated Debt, Consumer Durables & Apparel - 3 | Maximum                              
PIK Rate [20],[23],[24],[31],[32]               13.00% 13.00% 13.00% 13.00% 13.00% 13.00% 13.00%  
Investment, Identifier [Axis]: Hilding Anders, Subordinated Debt, Consumer Durables & Apparel -1                              
Principal Amount | € [6],[23],[24],[31],[32]                     € 24.8        
Amortized Cost [23],[24],[31],[32]               $ 26.9              
Fair Value [2],[23],[24],[31],[32]               0.0              
Investment, Identifier [Axis]: Hilding Anders, Subordinated Debt, Consumer Durables & Apparel -2                              
Principal Amount [6],[23],[24],[31],[32]               110.5              
Amortized Cost [23],[24],[31],[32]               0.0              
Fair Value [2],[23],[24],[31],[32]               0.0              
Investment, Identifier [Axis]: Home Partners JV 2, Private Equity 1                              
Fair Value 0.2             0.1             0.0
Investment, Identifier [Axis]: Home Partners JV 2, Private Equity 2                              
Fair Value $ 5.0             $ 1.6             0.0
Investment, Identifier [Axis]: Home Partners JV 2, Private Equity, Real Estate 1                              
Number of Shares | shares 4,471,509 [15],[28],[29],[41] 4,471,509 [15],[28],[29],[41] 4,471,509 [15],[28],[29],[41] 4,471,509 [15],[28],[29],[41] 4,471,509 [15],[28],[29],[41] 4,471,509 [15],[28],[29],[41] 4,471,509 [15],[28],[29],[41] 1,585,353 [6],[23],[24],[32],[42] 1,585,353 [6],[23],[24],[32],[42] 1,585,353 [6],[23],[24],[32],[42] 1,585,353 [6],[23],[24],[32],[42] 1,585,353 [6],[23],[24],[32],[42] 1,585,353 [6],[23],[24],[32],[42] 1,585,353 [6],[23],[24],[32],[42]  
Amortized Cost $ 4.4 [15],[28],[29],[41]             $ 1.5 [23],[24],[32],[42]              
Fair Value $ 5.0 [3],[15],[28],[29],[41]             $ 1.6 [2],[23],[24],[32],[42]              
Investment, Identifier [Axis]: Home Partners JV 2, Private Equity, Real Estate 2                              
Number of Shares | shares 168,710 [15],[28],[29],[41] 168,710 [15],[28],[29],[41] 168,710 [15],[28],[29],[41] 168,710 [15],[28],[29],[41] 168,710 [15],[28],[29],[41] 168,710 [15],[28],[29],[41] 168,710 [15],[28],[29],[41] 59,815 [6],[23],[24],[32],[42] 59,815 [6],[23],[24],[32],[42] 59,815 [6],[23],[24],[32],[42] 59,815 [6],[23],[24],[32],[42] 59,815 [6],[23],[24],[32],[42] 59,815 [6],[23],[24],[32],[42] 59,815 [6],[23],[24],[32],[42]  
Amortized Cost $ 0.2 [15],[28],[29],[41]             $ 0.1 [23],[24],[32],[42]              
Fair Value 0.2 [3],[15],[28],[29],[41]             0.1 [2],[23],[24],[32],[42]              
Investment, Identifier [Axis]: Home Partners JV 2, Structured Mezzanine                              
Fair Value $ 10.2             $ 3.5             0.0
Investment, Identifier [Axis]: Home Partners JV 2, Structured Mezzanine, Real Estate                              
PIK Rate [12],[15],[29],[41] 11.00% 11.00% 11.00% 11.00% 11.00% 11.00% 11.00%                
Principal Amount [15],[17],[29],[41] $ 10.2                            
Amortized Cost [15],[29],[41] 10.2                            
Fair Value [3],[15],[29],[41] $ 10.2                            
Investment, Identifier [Axis]: Home Partners JV 2, Structured Mezzanine, Real Estate | Maximum                              
PIK Rate [12],[15],[29],[41] 11.00% 11.00% 11.00% 11.00% 11.00% 11.00% 11.00%                
Investment, Identifier [Axis]: Home Partners JV 2, Structured Mezzanine, Real Estate 1                              
PIK Rate [7],[24],[32],[42]               11.00% 11.00% 11.00% 11.00% 11.00% 11.00% 11.00%  
Principal Amount [6],[24],[32],[42]               $ 3.5              
Amortized Cost [24],[32],[42]               3.4              
Fair Value [2],[24],[32],[42]               $ 3.5              
Investment, Identifier [Axis]: Home Partners JV 2, Structured Mezzanine, Real Estate 1 | Maximum                              
PIK Rate [7],[24],[32],[42]               11.00% 11.00% 11.00% 11.00% 11.00% 11.00% 11.00%  
Investment, Identifier [Axis]: Home Partners JV 2, Structured Mezzanine, Real Estate 2                              
PIK Rate [5],[7],[24],[42]               11.00% 11.00% 11.00% 11.00% 11.00% 11.00% 11.00%  
Principal Amount [5],[6],[24],[42]               $ 13.6              
Amortized Cost [5],[24],[42]               13.6              
Fair Value [2],[5],[24],[42]               $ 13.6              
Investment, Identifier [Axis]: Home Partners JV 2, Structured Mezzanine, Real Estate 2 | Maximum                              
PIK Rate [5],[7],[24],[42]               11.00% 11.00% 11.00% 11.00% 11.00% 11.00% 11.00%  
Investment, Identifier [Axis]: Home Partners JV, Common Stock                              
Fair Value $ 0.0             $ 80.6             21.5
Investment, Identifier [Axis]: Home Partners JV, Common Stock, Real Estate                              
Number of Shares | shares [6],[23],[24],[32],[42]               32,659,547 32,659,547 32,659,547 32,659,547 32,659,547 32,659,547 32,659,547  
Amortized Cost [23],[24],[32],[42]               $ 47.6              
Fair Value [2],[23],[24],[32],[42]               80.6              
Investment, Identifier [Axis]: Home Partners JV, Private Equity                              
Fair Value 0.0             9.4              
Investment, Identifier [Axis]: Home Partners JV, Private Equity 1                              
Fair Value               9.4             0.0
Investment, Identifier [Axis]: Home Partners JV, Private Equity 2                              
Fair Value               $ 0.0             0.0
Investment, Identifier [Axis]: Home Partners JV, Private Equity, Real Estate                              
Number of Shares | shares [6],[23],[24],[32],[42]               4,127,355 4,127,355 4,127,355 4,127,355 4,127,355 4,127,355 4,127,355  
Amortized Cost [23],[24],[32],[42]               $ 5.4              
Fair Value [2],[23],[24],[32],[42]               9.4              
Investment, Identifier [Axis]: Home Partners JV, Structured Mezzanine                              
Fair Value $ 0.0             $ 90.4             38.5
Investment, Identifier [Axis]: Home Partners JV, Structured Mezzanine, Real Estate                              
PIK Rate [7],[24],[32],[42]               11.00% 11.00% 11.00% 11.00% 11.00% 11.00% 11.00%  
Principal Amount [6],[24],[32],[42]               $ 90.4              
Amortized Cost [24],[32],[42]               85.6              
Fair Value [2],[24],[32],[42]               $ 90.4              
Investment, Identifier [Axis]: Home Partners JV, Structured Mezzanine, Real Estate | Maximum                              
PIK Rate [7],[24],[32],[42]               11.00% 11.00% 11.00% 11.00% 11.00% 11.00% 11.00%  
Investment, Identifier [Axis]: Home Partners of America Inc                              
Fair Value               $ 0.0             0.0
Investment, Identifier [Axis]: Home Partners of America Inc, Common Stock                              
Fair Value               0.0             130.5
Investment, Identifier [Axis]: Home Partners of America Inc, Warrant                              
Fair Value               $ 0.0             2.1
Investment, Identifier [Axis]: Hudson Technologies Co                              
Variable Rate [24],[32]               10.25% 10.25% 10.25% 10.25% 10.25% 10.25% 10.25%  
Floor Rate [24],[32]               1.00% 1.00% 1.00% 1.00% 1.00% 1.00% 1.00%  
Principal Amount [6],[24],[32]               $ 79.9              
Amortized Cost [24],[32]               72.3              
Fair Value [2],[24],[32]               $ 82.1              
Investment, Identifier [Axis]: Imagine Communications Corp, Common Stock, Media & Entertainment                              
Number of Shares | shares 33,034 [15],[28] 33,034 [15],[28] 33,034 [15],[28] 33,034 [15],[28] 33,034 [15],[28] 33,034 [15],[28] 33,034 [15],[28] 33,034 [23],[32] 33,034 [23],[32] 33,034 [23],[32] 33,034 [23],[32] 33,034 [23],[32] 33,034 [23],[32] 33,034 [23],[32]  
Amortized Cost $ 3.8 [15],[28]             $ 3.8 [23],[32]              
Fair Value $ 2.0 [1],[15],[28]             $ 2.5 [2],[23],[32]              
Investment, Identifier [Axis]: Individual FoodService, Capital Goods 1                              
Variable Rate [12],[34],[40] 6.25% 6.25% 6.25% 6.25% 6.25% 6.25% 6.25%                
Floor Rate [34],[40] 1.00% 1.00% 1.00% 1.00% 1.00% 1.00% 1.00%                
Principal Amount [17],[34],[40] $ 69.4                            
Amortized Cost [34],[40] 66.1                            
Fair Value [3],[34],[40] $ 68.7                            
Investment, Identifier [Axis]: Individual FoodService, Capital Goods 2                              
Variable Rate [12],[15] 6.25% 6.25% 6.25% 6.25% 6.25% 6.25% 6.25%                
Floor Rate [15] 1.00% 1.00% 1.00% 1.00% 1.00% 1.00% 1.00%                
Principal Amount [15],[17] $ 5.2                            
Amortized Cost [15] 5.2                            
Fair Value [3],[15] $ 5.2                            
Investment, Identifier [Axis]: Individual FoodService, Capital Goods 3                              
Variable Rate [12],[15],[40] 6.25% 6.25% 6.25% 6.25% 6.25% 6.25% 6.25%                
Floor Rate [15],[40] 1.00% 1.00% 1.00% 1.00% 1.00% 1.00% 1.00%                
Principal Amount [15],[17],[40] $ 16.7                            
Amortized Cost [15],[40] 16.7                            
Fair Value [3],[15],[40] $ 16.6                            
Investment, Identifier [Axis]: Individual FoodService, Capital Goods 4                              
Variable Rate [12],[15] 6.25% 6.25% 6.25% 6.25% 6.25% 6.25% 6.25%                
Floor Rate [15] 1.00% 1.00% 1.00% 1.00% 1.00% 1.00% 1.00%                
Principal Amount [15],[17] $ 5.4                            
Amortized Cost [15] 5.4                            
Fair Value [3],[15] $ 5.4                            
Investment, Identifier [Axis]: Individual FoodService, Capital Goods 5                              
Variable Rate [12],[15] 6.25% 6.25% 6.25% 6.25% 6.25% 6.25% 6.25%                
Floor Rate [15] 1.00% 1.00% 1.00% 1.00% 1.00% 1.00% 1.00%                
Principal Amount [15],[17] $ 6.9                            
Amortized Cost [15] 6.9                            
Fair Value [3],[15] $ 6.8                            
Investment, Identifier [Axis]: Individual FoodService, Capital Goods 6                              
Variable Rate [4],[12] 6.25% 6.25% 6.25% 6.25% 6.25% 6.25% 6.25%                
Floor Rate [4] 1.00% 1.00% 1.00% 1.00% 1.00% 1.00% 1.00%                
Principal Amount [4],[17] $ 4.8                            
Amortized Cost [4] 4.7                            
Fair Value [3],[4] $ 4.7                            
Investment, Identifier [Axis]: Individual FoodService, Capital Goods 7                              
Variable Rate [4],[12] 6.25% 6.25% 6.25% 6.25% 6.25% 6.25% 6.25%                
Floor Rate [4] 1.00% 1.00% 1.00% 1.00% 1.00% 1.00% 1.00%                
Principal Amount [4],[17] $ 1.4                            
Amortized Cost [4] 1.4                            
Fair Value [3],[4] $ 1.4                            
Investment, Identifier [Axis]: Individual FoodService, Senior Secured Loans—First Lien, Capital Goods , Maturing November 22, 2024 -1                              
Variable Rate [32]               6.25% 6.25% 6.25% 6.25% 6.25% 6.25% 6.25%  
Floor Rate [32]               1.00% 1.00% 1.00% 1.00% 1.00% 1.00% 1.00%  
Principal Amount [6],[32]               $ 0.2              
Amortized Cost [32]               0.2              
Fair Value [2],[32]               $ 0.2              
Investment, Identifier [Axis]: Individual FoodService, Senior Secured Loans—First Lien, Capital Goods , Maturing November 22, 2024 -2                              
Variable Rate [5]               6.25% 6.25% 6.25% 6.25% 6.25% 6.25% 6.25%  
Floor Rate [5]               1.00% 1.00% 1.00% 1.00% 1.00% 1.00% 1.00%  
Principal Amount [5],[6]               $ 4.5              
Amortized Cost [5]               4.5              
Fair Value [2],[5]               $ 4.5              
Investment, Identifier [Axis]: Individual FoodService, Senior Secured Loans—First Lien, Capital Goods , Maturing November 22, 2025 - 2                              
Variable Rate [5]               6.25% 6.25% 6.25% 6.25% 6.25% 6.25% 6.25%  
Floor Rate [5]               1.00% 1.00% 1.00% 1.00% 1.00% 1.00% 1.00%  
Principal Amount [5],[6]               $ 5.6              
Amortized Cost [5]               5.6              
Fair Value [2],[5]               $ 5.7              
Investment, Identifier [Axis]: Individual FoodService, Senior Secured Loans—First Lien, Capital Goods , Maturing November 22, 2025 -1                              
Variable Rate [32],[33],[39]               6.25% 6.25% 6.25% 6.25% 6.25% 6.25% 6.25%  
Floor Rate [32],[33],[39]               1.00% 1.00% 1.00% 1.00% 1.00% 1.00% 1.00%  
Principal Amount [6],[32],[33],[39]               $ 90.8              
Amortized Cost [32],[33],[39]               86.5              
Fair Value [2],[32],[33],[39]               $ 91.7              
Investment, Identifier [Axis]: Industria Chimica Emiliana Srl                              
Variable Rate [24],[32]               7.25% 7.25% 7.25% 7.25% 7.25% 7.25% 7.25%  
Floor Rate [24],[32]               0.00% 0.00% 0.00% 0.00% 0.00% 0.00% 0.00%  
Principal Amount [6],[24],[32]               $ 88.8              
Amortized Cost [24],[32]               101.3              
Fair Value [2],[24],[32]               $ 103.9              
Investment, Identifier [Axis]: Industria Chimica Emiliana Srl, Pharmaceuticals, Biotechnology & Life Sciences                              
Variable Rate [12],[15],[29] 7.25% 7.25% 7.25% 7.25% 7.25% 7.25% 7.25%                
Floor Rate [15],[29] 0.00% 0.00% 0.00% 0.00% 0.00% 0.00% 0.00%                
Principal Amount | € [15],[17],[29]       € 88.8                      
Amortized Cost [15],[29] $ 102.1                            
Fair Value [3],[15],[29] $ 91.3                            
Investment, Identifier [Axis]: Industry City TI Lessor LP                              
Variable Rate [32],[33]               10.80% 10.80% 10.80% 10.80% 10.80% 10.80% 10.80%  
PIK Rate [32],[33]               1.00% 1.00% 1.00% 1.00% 1.00% 1.00% 1.00%  
Principal Amount [6],[32],[33]               $ 29.9              
Amortized Cost [32],[33]               30.0              
Fair Value [2],[32],[33]               $ 32.5              
Investment, Identifier [Axis]: Industry City TI Lessor LP | Maximum                              
PIK Rate [32],[33]               1.00% 1.00% 1.00% 1.00% 1.00% 1.00% 1.00%  
Investment, Identifier [Axis]: Industry City TI Lessor LP, Consumer Services                              
Rate [12],[15],[34] 10.80% 10.80% 10.80% 10.80% 10.80% 10.80% 10.80%                
PIK Rate [12],[15],[34] 1.00% 1.00% 1.00% 1.00% 1.00% 1.00% 1.00%                
Principal Amount [15],[17],[34] $ 25.6                            
Amortized Cost [15],[34] 25.7                            
Fair Value [3],[15],[34] $ 26.0                            
Investment, Identifier [Axis]: Industry City TI Lessor LP, Consumer Services | Maximum                              
PIK Rate [12],[15],[34] 1.00% 1.00% 1.00% 1.00% 1.00% 1.00% 1.00%                
Investment, Identifier [Axis]: Insight Global LLC, Commercial & Professional Services 1                              
Variable Rate [12] 6.00% 6.00% 6.00% 6.00% 6.00% 6.00% 6.00%                
Floor Rate [15] 0.80% 0.80% 0.80% 0.80% 0.80% 0.80% 0.80%                
Principal Amount [15],[17] $ 8.4                            
Amortized Cost [15] 8.4                            
Fair Value [3],[15] $ 8.2                            
Investment, Identifier [Axis]: Insight Global LLC, Commercial & Professional Services 2                              
Variable Rate [12],[15],[16] 6.00% 6.00% 6.00% 6.00% 6.00% 6.00% 6.00%                
Floor Rate [15],[16] 0.80% 0.80% 0.80% 0.80% 0.80% 0.80% 0.80%                
Principal Amount [15],[16],[17] $ 203.3                            
Amortized Cost [15],[16] 201.5                            
Fair Value [3],[15],[16] $ 197.0                            
Investment, Identifier [Axis]: Insight Global LLC, Commercial & Professional Services 3                              
Variable Rate [4],[12] 6.00% 6.00% 6.00% 6.00% 6.00% 6.00% 6.00%                
Floor Rate [4] 0.80% 0.80% 0.80% 0.80% 0.80% 0.80% 0.80%                
Principal Amount [4],[17] $ 12.6                            
Amortized Cost [4] 12.6                            
Fair Value [3],[4] $ 12.2                            
Investment, Identifier [Axis]: Insight Global LLC, Commercial & Professional Services 4                              
Variable Rate [4],[12] 6.00% 6.00% 6.00% 6.00% 6.00% 6.00% 6.00%                
Floor Rate [4] 0.80% 0.80% 0.80% 0.80% 0.80% 0.80% 0.80%                
Principal Amount [4],[17] $ 26.8                            
Amortized Cost [4] 26.8                            
Fair Value [3],[4] $ 26.0                            
Investment, Identifier [Axis]: Insight Global LLC, Senior Secured Loans—First Lien, Commercial & Professional Services, Maturing September 22, 2027 -1                              
Variable Rate [32]               6.00% 6.00% 6.00% 6.00% 6.00% 6.00% 6.00%  
Floor Rate [32]               0.80% 0.80% 0.80% 0.80% 0.80% 0.80% 0.80%  
Principal Amount [6],[32]               $ 10.5              
Amortized Cost [32]               10.5              
Fair Value [2],[32]               $ 10.4              
Investment, Identifier [Axis]: Insight Global LLC, Senior Secured Loans—First Lien, Commercial & Professional Services, Maturing September 22, 2027 -2                              
Variable Rate [5]               6.00% 6.00% 6.00% 6.00% 6.00% 6.00% 6.00%  
Floor Rate [5]               0.80% 0.80% 0.80% 0.80% 0.80% 0.80% 0.80%  
Principal Amount [5],[6]               $ 10.5              
Amortized Cost [5]               10.5              
Fair Value [2],[5]               $ 10.4              
Investment, Identifier [Axis]: Insight Global LLC, Senior Secured Loans—First Lien, Commercial & Professional Services, Maturing September 22, 2028                              
Variable Rate [10],[32]               6.00% 6.00% 6.00% 6.00% 6.00% 6.00% 6.00%  
Floor Rate [10],[32]               0.80% 0.80% 0.80% 0.80% 0.80% 0.80% 0.80%  
Principal Amount [6],[10],[32]               $ 230.0              
Amortized Cost [10],[32]               227.8              
Fair Value [2],[10],[32]               $ 227.2              
Investment, Identifier [Axis]: Insight Global LLC, Senior Secured Loans—First Lien, Commercial & Professional Services, Maturing November 15, 2028                              
Variable Rate [5]               6.00% 6.00% 6.00% 6.00% 6.00% 6.00% 6.00%  
Floor Rate [5]               0.80% 0.80% 0.80% 0.80% 0.80% 0.80% 0.80%  
Principal Amount [5],[6]               $ 20.0              
Amortized Cost [5]               20.0              
Fair Value [2],[5]               $ 19.8              
Investment, Identifier [Axis]: Integrity Marketing Group LLC                              
Variable Rate [5]               5.50% 5.50% 5.50% 5.50% 5.50% 5.50% 5.50%  
Floor Rate [5]               0.80% 0.80% 0.80% 0.80% 0.80% 0.80% 0.80%  
Principal Amount [5],[6]               $ 145.3              
Amortized Cost [5]               145.3              
Fair Value [2],[5]               $ 143.2              
Investment, Identifier [Axis]: Integrity Marketing Group LLC, Insurance                              
Variable Rate [12],[15] 6.02% 6.02% 6.02% 6.02% 6.02% 6.02% 6.02%                
Floor Rate [15] 0.80% 0.80% 0.80% 0.80% 0.80% 0.80% 0.80%                
Principal Amount [15],[17] $ 124.4                            
Amortized Cost [15] 124.4                            
Fair Value [3],[15] $ 122.4                            
Investment, Identifier [Axis]: J S Held LLC, Insurance 1                              
Variable Rate [12],[15],[16],[18],[34],[40] 5.50% 5.50% 5.50% 5.50% 5.50% 5.50% 5.50%                
Floor Rate [15],[16],[18],[34],[40] 1.00% 1.00% 1.00% 1.00% 1.00% 1.00% 1.00%                
Principal Amount [15],[16],[17],[18],[34],[40] $ 103.0                            
Amortized Cost [15],[16],[18],[34],[40] 101.0                            
Fair Value [3],[15],[16],[18],[34],[40] $ 101.8                            
Investment, Identifier [Axis]: J S Held LLC, Insurance 2                              
Variable Rate [12],[15] 5.50% 5.50% 5.50% 5.50% 5.50% 5.50% 5.50%                
Floor Rate [15] 1.00% 1.00% 1.00% 1.00% 1.00% 1.00% 1.00%                
Principal Amount [15],[17] $ 8.9                            
Amortized Cost [15] 8.7                            
Fair Value [3],[15] $ 8.8                            
Investment, Identifier [Axis]: J S Held LLC, Insurance 3                              
Variable Rate [12] 5.50% 5.50% 5.50% 5.50% 5.50% 5.50% 5.50%                
Floor Rate [15] 1.00% 1.00% 1.00% 1.00% 1.00% 1.00% 1.00%                
Principal Amount [15],[17] $ 22.2                            
Amortized Cost [15] 22.2                            
Fair Value [3],[15] $ 22.0                            
Investment, Identifier [Axis]: J S Held LLC, Insurance 4                              
Variable Rate [12],[15],[18] 5.50% 5.50% 5.50% 5.50% 5.50% 5.50% 5.50%                
Floor Rate [15],[18] 1.00% 1.00% 1.00% 1.00% 1.00% 1.00% 1.00%                
Principal Amount [15],[17],[18] $ 24.8                            
Amortized Cost [15],[18] 24.8                            
Fair Value [3],[15],[18] $ 24.6                            
Investment, Identifier [Axis]: J S Held LLC, Insurance 5                              
Variable Rate [4],[12] 5.50% 5.50% 5.50% 5.50% 5.50% 5.50% 5.50%                
Floor Rate [4] 1.00% 1.00% 1.00% 1.00% 1.00% 1.00% 1.00%                
Principal Amount [4],[17] $ 5.2                            
Amortized Cost [4] 5.2                            
Fair Value [3],[4] $ 5.2                            
Investment, Identifier [Axis]: J S Held LLC, Insurance 6                              
Variable Rate [4],[12] 5.50% 5.50% 5.50% 5.50% 5.50% 5.50% 5.50%                
Floor Rate [4] 1.00% 1.00% 1.00% 1.00% 1.00% 1.00% 1.00%                
Principal Amount [4],[17] $ 19.2                            
Amortized Cost [4] 19.2                            
Fair Value [3],[4] 19.0                            
Investment, Identifier [Axis]: J S Held LLC,, Senior Secured Loans—First Lien, Insurance -1                              
Variable Rate [10],[32],[33],[39],[43]               5.50% 5.50% 5.50% 5.50% 5.50% 5.50% 5.50%  
Floor Rate [10],[32],[33],[39],[43]               1.00% 1.00% 1.00% 1.00% 1.00% 1.00% 1.00%  
Principal Amount [6],[10],[32],[33],[39],[43]               $ 165.4              
Amortized Cost [10],[32],[33],[39],[43]               159.8              
Fair Value [2],[10],[32],[33],[39],[43]               $ 167.1              
Investment, Identifier [Axis]: J S Held LLC,, Senior Secured Loans—First Lien, Insurance -2                              
Variable Rate [32]               5.50% 5.50% 5.50% 5.50% 5.50% 5.50% 5.50%  
Floor Rate [32]               1.00% 1.00% 1.00% 1.00% 1.00% 1.00% 1.00%  
Principal Amount [6],[32]               $ 2.8              
Amortized Cost [32]               2.6              
Fair Value [2],[32]               $ 2.8              
Investment, Identifier [Axis]: J S Held LLC,, Senior Secured Loans—First Lien, Insurance -3                              
Variable Rate [5]               5.50% 5.50% 5.50% 5.50% 5.50% 5.50% 5.50%  
Floor Rate [5]               1.00% 1.00% 1.00% 1.00% 1.00% 1.00% 1.00%  
Principal Amount [5],[6]               $ 16.7              
Amortized Cost [5]               16.7              
Fair Value [2],[5]               $ 16.9              
Investment, Identifier [Axis]: J S Held LLC,, Senior Secured Loans—First Lien, Insurance -4                              
Variable Rate [5]               5.50% 5.50% 5.50% 5.50% 5.50% 5.50% 5.50%  
Floor Rate [5]               1.00% 1.00% 1.00% 1.00% 1.00% 1.00% 1.00%  
Principal Amount [5],[6]               $ 11.3              
Amortized Cost [5]               11.3              
Fair Value [2],[5]               $ 11.3              
Investment, Identifier [Axis]: JW Aluminum Co                              
Rate [31],[32],[33],[36]               10.30% 10.30% 10.30% 10.30% 10.30% 10.30% 10.30%  
Principal Amount [6],[31],[32],[33],[36]               $ 76.5              
Amortized Cost [31],[32],[33],[36]               75.5              
Fair Value 78.1             81.0 [2],[31],[32],[33],[36]              
Investment, Identifier [Axis]: JW Aluminum Co 1                              
Fair Value [58]               0.0             41.8
Investment, Identifier [Axis]: JW Aluminum Co 2                              
Fair Value [57]               81.0             0.0
Investment, Identifier [Axis]: JW Aluminum Co, Common Stock                              
Fair Value $ 2.4             $ 0.0 [57],[58]             0.0 [57],[58]
Investment, Identifier [Axis]: JW Aluminum Co, Common Stock, Materials                              
Number of Shares | shares 2,105 [15],[28],[30],[53],[54] 2,105 [15],[28],[30],[53],[54] 2,105 [15],[28],[30],[53],[54] 2,105 [15],[28],[30],[53],[54] 2,105 [15],[28],[30],[53],[54] 2,105 [15],[28],[30],[53],[54] 2,105 [15],[28],[30],[53],[54] 2,105 [11],[23],[31],[32],[52] 2,105 [11],[23],[31],[32],[52] 2,105 [11],[23],[31],[32],[52] 2,105 [11],[23],[31],[32],[52] 2,105 [11],[23],[31],[32],[52] 2,105 [11],[23],[31],[32],[52] 2,105 [11],[23],[31],[32],[52]  
Amortized Cost $ 0.0 [15],[28],[30],[53],[54]             $ 0.0 [11],[23],[31],[32],[52]              
Fair Value $ 2.4 [1],[15],[28],[30],[53],[54]             0.0 [2],[11],[23],[31],[32],[52]              
Investment, Identifier [Axis]: JW Aluminum Co, Materials                              
Rate [12] 10.30% 10.30% 10.30% 10.30% 10.30% 10.30% 10.30%                
Principal Amount [15],[17],[30],[34],[37] $ 76.5                            
Amortized Cost [15],[30],[34],[37] 75.7                            
Fair Value [3],[15],[30],[34],[37] 78.1                            
Investment, Identifier [Axis]: JW Aluminum Co, Preferred Stock                              
Fair Value $ 112.5 [59]             122.6 [57],[59]             0.0 [57]
Investment, Identifier [Axis]: JW Aluminum Co, Preferred Stock 2                              
Fair Value [58]               $ 0.0             $ 93.7
Investment, Identifier [Axis]: JW Aluminum Co, Preferred Stock, Materials                              
PIK Rate 6.30% [12],[15],[30],[53],[54] 6.30% [12],[15],[30],[53],[54] 6.30% [12],[15],[30],[53],[54] 6.30% [12],[15],[30],[53],[54] 6.30% [12],[15],[30],[53],[54] 6.30% [12],[15],[30],[53],[54] 6.30% [12],[15],[30],[53],[54]               12.50% [7],[11],[31],[32],[52]
Number of Shares | shares 15,279 [15],[30],[53],[54] 15,279 [15],[30],[53],[54] 15,279 [15],[30],[53],[54] 15,279 [15],[30],[53],[54] 15,279 [15],[30],[53],[54] 15,279 [15],[30],[53],[54] 15,279 [15],[30],[53],[54] 15,279 [11],[31],[32],[52] 15,279 [11],[31],[32],[52] 15,279 [11],[31],[32],[52] 15,279 [11],[31],[32],[52] 15,279 [11],[31],[32],[52] 15,279 [11],[31],[32],[52] 15,279 [11],[31],[32],[52]  
Amortized Cost $ 200.1 [15],[30],[53],[54]             $ 177.9 [11],[31],[32],[52]              
Fair Value $ 112.5 [1],[15],[30],[53],[54]             $ 122.6 [2],[11],[31],[32],[52]              
Investment, Identifier [Axis]: JW Aluminum Co, Preferred Stock, Materials | Maximum                              
PIK Rate 12.50% [12],[15],[30],[53],[54] 12.50% [12],[15],[30],[53],[54] 12.50% [12],[15],[30],[53],[54] 12.50% [12],[15],[30],[53],[54] 12.50% [12],[15],[30],[53],[54] 12.50% [12],[15],[30],[53],[54] 12.50% [12],[15],[30],[53],[54]               12.50% [7],[11],[31],[32],[52]
Investment, Identifier [Axis]: Jarrow Formulas Inc                              
Variable Rate [8],[9],[10],[32],[33],[38],[39],[43]               6.25% 6.25% 6.25% 6.25% 6.25% 6.25% 6.25%  
Floor Rate [8],[9],[10],[32],[33],[39],[43]               1.00% 1.00% 1.00% 1.00% 1.00% 1.00% 1.00%  
Principal Amount [6],[8],[9],[10],[32],[33],[39],[43]               $ 186.6              
Amortized Cost [8],[9],[10],[32],[33],[39],[43]               177.1              
Fair Value [2],[8],[9],[10],[32],[33],[39],[43]               190.3              
Investment, Identifier [Axis]: Jarrow Formulas Inc, Household & Personal Products                              
Variable Rate [12],[13],[14],[15],[16],[18],[19],[34],[40] 6.25% 6.25% 6.25% 6.25% 6.25% 6.25% 6.25%                
Floor Rate [13],[14],[15],[16],[18],[19],[34],[40] 1.00% 1.00% 1.00% 1.00% 1.00% 1.00% 1.00%                
Principal Amount [13],[14],[15],[16],[17],[18],[19],[34],[40] $ 181.8                            
Amortized Cost [13],[14],[15],[16],[18],[19],[34],[40] 174.1                            
Fair Value [3],[13],[14],[15],[16],[18],[19],[34],[40] 181.3                            
Investment, Identifier [Axis]: Jet Edge International LLC, Preferred Stock                              
Fair Value 0.0             $ 16.8             $ 0.0
Investment, Identifier [Axis]: Jet Edge International LLC, Preferred Stock, Transportation                              
Rate [7],[42],[49]               8.00% 8.00% 8.00% 8.00% 8.00% 8.00% 8.00%  
PIK Rate [7],[42],[49]               0.00% 0.00% 0.00% 0.00% 0.00% 0.00% 0.00%  
Number of Shares | shares [6],[42],[49]               20,878,236 20,878,236 20,878,236 20,878,236 20,878,236 20,878,236 20,878,236  
Amortized Cost [42],[49]               $ 20.9              
Fair Value [2],[42],[49]               $ 16.8              
Investment, Identifier [Axis]: Jet Edge International LLC, Preferred Stock, Transportation | Maximum                              
PIK Rate [7],[42],[49]               8.00% 8.00% 8.00% 8.00% 8.00% 8.00% 8.00%  
Investment, Identifier [Axis]: Jet Edge International LLC, Term Loan                              
Fair Value $ 0.0             $ 75.6             0.0
Investment, Identifier [Axis]: Jet Edge International LLC, Term Loan, Transportation 1                              
Rate 10.00% [12],[15] 10.00% [12],[15] 10.00% [12],[15] 10.00% [12],[15] 10.00% [12],[15] 10.00% [12],[15] 10.00% [12],[15] 10.00% [7],[32],[42] 10.00% [7],[32],[42] 10.00% [7],[32],[42] 10.00% [7],[32],[42] 10.00% [7],[32],[42] 10.00% [7],[32],[42] 10.00% [7],[32],[42]  
PIK Rate 2.00% [12],[15] 2.00% [12],[15] 2.00% [12],[15] 2.00% [12],[15] 2.00% [12],[15] 2.00% [12],[15] 2.00% [12],[15] 2.00% [7],[32],[42] 2.00% [7],[32],[42] 2.00% [7],[32],[42] 2.00% [7],[32],[42] 2.00% [7],[32],[42] 2.00% [7],[32],[42] 2.00% [7],[32],[42]  
Principal Amount $ 74.5 [15],[17]             $ 76.6 [6],[32],[42]              
Amortized Cost 74.5 [15]             75.9 [32],[42]              
Fair Value $ 76.7 [3],[15]             $ 76.1 [2],[32],[42]              
Investment, Identifier [Axis]: Jet Edge International LLC, Term Loan, Transportation 1 | Maximum                              
PIK Rate 2.00% [12],[15] 2.00% [12],[15] 2.00% [12],[15] 2.00% [12],[15] 2.00% [12],[15] 2.00% [12],[15] 2.00% [12],[15] 2.00% [7],[32],[42] 2.00% [7],[32],[42] 2.00% [7],[32],[42] 2.00% [7],[32],[42] 2.00% [7],[32],[42] 2.00% [7],[32],[42] 2.00% [7],[32],[42]  
Investment, Identifier [Axis]: Jet Edge International LLC, Term Loan, Transportation 2                              
Rate 10.00% [4],[12] 10.00% [4],[12] 10.00% [4],[12] 10.00% [4],[12] 10.00% [4],[12] 10.00% [4],[12] 10.00% [4],[12] 10.00% [5],[7],[42] 10.00% [5],[7],[42] 10.00% [5],[7],[42] 10.00% [5],[7],[42] 10.00% [5],[7],[42] 10.00% [5],[7],[42] 10.00% [5],[7],[42]  
PIK Rate 2.00% [4],[12] 2.00% [4],[12] 2.00% [4],[12] 2.00% [4],[12] 2.00% [4],[12] 2.00% [4],[12] 2.00% [4],[12] 2.00% [5],[7],[42] 2.00% [5],[7],[42] 2.00% [5],[7],[42] 2.00% [5],[7],[42] 2.00% [5],[7],[42] 2.00% [5],[7],[42] 2.00% [5],[7],[42]  
Principal Amount $ 0.7 [4],[17]             $ 75.0 [5],[6],[42]              
Amortized Cost 0.7 [4]             75.0 [5],[42]              
Fair Value $ 0.7 [3],[4]             $ 74.5 [2],[5],[42]              
Investment, Identifier [Axis]: Jet Edge International LLC, Term Loan, Transportation 2 | Maximum                              
PIK Rate 2.00% [4],[12] 2.00% [4],[12] 2.00% [4],[12] 2.00% [4],[12] 2.00% [4],[12] 2.00% [4],[12] 2.00% [4],[12] 2.00% [5],[7],[42] 2.00% [5],[7],[42] 2.00% [5],[7],[42] 2.00% [5],[7],[42] 2.00% [5],[7],[42] 2.00% [5],[7],[42] 2.00% [5],[7],[42]  
Investment, Identifier [Axis]: Jet Edge International LLC, Warrant                              
Fair Value $ 0.0             $ 4.5             0.0
Investment, Identifier [Axis]: Jet Edge International LLC, Warrant, Transportation                              
Number of Shares | shares [6],[23],[42],[46]               3,963,000,000 3,963,000,000 3,963,000,000 3,963,000,000 3,963,000,000 3,963,000,000 3,963,000,000  
Amortized Cost [23],[42],[46]               $ 0.0              
Fair Value [2],[23],[42],[46]               $ 4.5              
Investment, Identifier [Axis]: Jones Apparel Holdings, Inc., Common Stock, Consumer Durables & Apparel                              
Number of Shares | shares 5,451 [15],[28] 5,451 [15],[28] 5,451 [15],[28] 5,451 [15],[28] 5,451 [15],[28] 5,451 [15],[28] 5,451 [15],[28] 5,451 [23],[32] 5,451 [23],[32] 5,451 [23],[32] 5,451 [23],[32] 5,451 [23],[32] 5,451 [23],[32] 5,451 [23],[32]  
Amortized Cost $ 0.9 [15],[28]             $ 0.9 [23],[32]              
Fair Value 0.0 [1],[15],[28]             $ 0.0 [2],[23],[32]              
Investment, Identifier [Axis]: KBP Investments LLC, Senior Secured Loans—First Lien, Food & Staples Retailing -1                              
Variable Rate [32]               5.00% 5.00% 5.00% 5.00% 5.00% 5.00% 5.00%  
Floor Rate [32]               0.80% 0.80% 0.80% 0.80% 0.80% 0.80% 0.80%  
Principal Amount [6],[32]               $ 23.6              
Amortized Cost [32]               22.9              
Fair Value [2],[32]               $ 23.3              
Investment, Identifier [Axis]: KBP Investments LLC, Senior Secured Loans—First Lien, Food & Staples Retailing -2                              
Variable Rate [5]               5.00% 5.00% 5.00% 5.00% 5.00% 5.00% 5.00%  
Floor Rate [5]               0.80% 0.80% 0.80% 0.80% 0.80% 0.80% 0.80%  
Principal Amount [5],[6]               $ 3.9              
Amortized Cost [5]               3.9              
Fair Value [2],[5]               3.8              
Investment, Identifier [Axis]: KKR Altitude II Offshore Aggregator LP, Partnership Interest                              
Fair Value $ 44.4             $ 0.0              
Investment, Identifier [Axis]: KKR Altitude II Offshore Aggregator LP, Partnership Interest, Capital Goods                              
Number of Shares | shares [15],[28],[29],[30] 44,424,346 44,424,346 44,424,346 44,424,346 44,424,346 44,424,346 44,424,346                
Amortized Cost [15],[28],[29],[30] $ 44.4                            
Fair Value [3],[15],[28],[29],[30] $ 44.4                            
Investment, Identifier [Axis]: KKR Central Park Leasing Aggregator L.P., Partnership Interest, Capital Goods                              
Rate 14.30% [12],[15],[25],[28],[29] 14.30% [12],[15],[25],[28],[29] 14.30% [12],[15],[25],[28],[29] 14.30% [12],[15],[25],[28],[29] 14.30% [12],[15],[25],[28],[29] 14.30% [12],[15],[25],[28],[29] 14.30% [12],[15],[25],[28],[29] 14.30% [7],[20],[23],[24],[32] 14.30% [7],[20],[23],[24],[32] 14.30% [7],[20],[23],[24],[32] 14.30% [7],[20],[23],[24],[32] 14.30% [7],[20],[23],[24],[32] 14.30% [7],[20],[23],[24],[32] 14.30% [7],[20],[23],[24],[32]  
Principal Amount $ 39.1 [15],[17],[25],[28],[29]             $ 39.1 [6],[20],[23],[24],[32]              
Amortized Cost 39.1 [15],[25],[28],[29]             39.1 [20],[23],[24],[32]              
Fair Value $ 16.3 [3],[15],[25],[28],[29]             $ 25.8 [2],[20],[23],[24],[32]              
Investment, Identifier [Axis]: KKR Chord IP Aggregator LP, Partnership Interest, Media & Entertainment                              
Number of Shares | shares 89,453,083 [15],[29] 89,453,083 [15],[29] 89,453,083 [15],[29] 89,453,083 [15],[29] 89,453,083 [15],[29] 89,453,083 [15],[29] 89,453,083 [15],[29] 114,193,861 [6],[24],[32] 114,193,861 [6],[24],[32] 114,193,861 [6],[24],[32] 114,193,861 [6],[24],[32] 114,193,861 [6],[24],[32] 114,193,861 [6],[24],[32] 114,193,861 [6],[24],[32]  
Amortized Cost $ 89.5 [15],[29]             $ 112.6 [24],[32]              
Fair Value $ 96.3 [3],[15],[29]             $ 131.5 [2],[24],[32]              
Investment, Identifier [Axis]: KKR Chord IP Aggregator LP, Structured Mezzanine, Media & Entertainment                              
Rate [7],[24],[32]               9.00% 9.00% 9.00% 9.00% 9.00% 9.00% 9.00%  
Principal Amount [6],[24],[32]               $ 167.3              
Amortized Cost [24],[32]               164.9              
Fair Value [2],[24],[32]               167.3              
Investment, Identifier [Axis]: KKR Residential Opportunities I LLC, Private Equity, Real Estate                              
Number of Shares | shares [15],[28] 17,510,867 17,510,867 17,510,867 17,510,867 17,510,867 17,510,867 17,510,867                
Amortized Cost [15],[28] $ 17.5                            
Fair Value [3],[15],[28] 17.6                            
Investment, Identifier [Axis]: KKR Rocket Loans Aggregator LLC, Partnership Interest                              
Fair Value $ 4.3             $ 1.4             0.0
Investment, Identifier [Axis]: KKR Rocket Loans Aggregator LLC, Partnership Interest, Diversified Financials                              
Number of Shares | shares 4,336,415 [15],[29],[30] 4,336,415 [15],[29],[30] 4,336,415 [15],[29],[30] 4,336,415 [15],[29],[30] 4,336,415 [15],[29],[30] 4,336,415 [15],[29],[30] 4,336,415 [15],[29],[30] 1,387,913 [6],[24],[31],[32] 1,387,913 [6],[24],[31],[32] 1,387,913 [6],[24],[31],[32] 1,387,913 [6],[24],[31],[32] 1,387,913 [6],[24],[31],[32] 1,387,913 [6],[24],[31],[32] 1,387,913 [6],[24],[31],[32]  
Amortized Cost $ 4.3 [15],[29],[30]             $ 1.4 [24],[31],[32]              
Fair Value $ 4.3 [3],[15],[29],[30]             $ 1.4 [2],[24],[31],[32]              
Investment, Identifier [Axis]: KKR Zeno Aggregator LP (K2 Aviation), Partnership Interest, Capital Goods                              
Number of Shares | shares 23,664,954 [15],[28],[29] 23,664,954 [15],[28],[29] 23,664,954 [15],[28],[29] 23,664,954 [15],[28],[29] 23,664,954 [15],[28],[29] 23,664,954 [15],[28],[29] 23,664,954 [15],[28],[29] 23,664,954 [6],[23],[24],[32] 23,664,954 [6],[23],[24],[32] 23,664,954 [6],[23],[24],[32] 23,664,954 [6],[23],[24],[32] 23,664,954 [6],[23],[24],[32] 23,664,954 [6],[23],[24],[32] 23,664,954 [6],[23],[24],[32]  
Amortized Cost $ 23.0 [15],[28],[29]             $ 23.0 [23],[24],[32]              
Fair Value $ 20.0 [3],[15],[28],[29]             $ 19.1 [2],[23],[24],[32]              
Investment, Identifier [Axis]: Karman Space Inc, Capital Goods 1                              
Variable Rate [12],[15],[40] 7.00% 7.00% 7.00% 7.00% 7.00% 7.00% 7.00%                
Floor Rate [15],[40] 1.00% 1.00% 1.00% 1.00% 1.00% 1.00% 1.00%                
Principal Amount [15],[17],[40] $ 51.1                            
Amortized Cost [15],[40] 48.9                            
Fair Value [3],[15],[40] $ 49.7                            
Investment, Identifier [Axis]: Karman Space Inc, Capital Goods 2                              
Variable Rate [12],[15] 7.00% 7.00% 7.00% 7.00% 7.00% 7.00% 7.00%                
Floor Rate [15] 1.00% 1.00% 1.00% 1.00% 1.00% 1.00% 1.00%                
Principal Amount [15],[17] $ 4.5                            
Amortized Cost [15] 4.3                            
Fair Value [3],[15] $ 4.4                            
Investment, Identifier [Axis]: Karman Space Inc, Capital Goods 3                              
Variable Rate [12],[15] 7.00% 7.00% 7.00% 7.00% 7.00% 7.00% 7.00%                
Floor Rate [15] 1.00% 1.00% 1.00% 1.00% 1.00% 1.00% 1.00%                
Principal Amount [15],[17] $ 37.1                            
Amortized Cost [15] 36.6                            
Fair Value [3],[15] $ 36.1                            
Investment, Identifier [Axis]: Karman Space Inc, Capital Goods 4                              
Variable Rate [4],[12] 7.00% 7.00% 7.00% 7.00% 7.00% 7.00% 7.00%                
Floor Rate [4] 1.00% 1.00% 1.00% 1.00% 1.00% 1.00% 1.00%                
Principal Amount [4],[17] $ 1.0                            
Amortized Cost [4] 1.0                            
Fair Value [3],[4] $ 0.9                            
Investment, Identifier [Axis]: Karman Space Inc, Senior Secured Loans—First Lien, Capital Goods -1                              
Variable Rate [32],[39]               6.75% 6.75% 6.75% 6.75% 6.75% 6.75% 6.75%  
Floor Rate [32],[39]               1.00% 1.00% 1.00% 1.00% 1.00% 1.00% 1.00%  
Principal Amount [6],[32],[39]               $ 92.4              
Amortized Cost [32],[39]               88.8              
Fair Value [2],[32],[39]               $ 94.2              
Investment, Identifier [Axis]: Karman Space Inc, Senior Secured Loans—First Lien, Capital Goods -2                              
Variable Rate [32]               6.75% 6.75% 6.75% 6.75% 6.75% 6.75% 6.75%  
Floor Rate [32]               1.00% 1.00% 1.00% 1.00% 1.00% 1.00% 1.00%  
Principal Amount [6],[32]               $ 4.4              
Amortized Cost [32]               4.2              
Fair Value [2],[32]               $ 4.4              
Investment, Identifier [Axis]: Karman Space Inc, Senior Secured Loans—First Lien, Capital Goods -3                              
Variable Rate [5]               6.75% 6.75% 6.75% 6.75% 6.75% 6.75% 6.75%  
Floor Rate [5]               1.00% 1.00% 1.00% 1.00% 1.00% 1.00% 1.00%  
Principal Amount [5],[6]               $ 1.1              
Amortized Cost [5]               1.1              
Fair Value [2],[5]               $ 1.1              
Investment, Identifier [Axis]: Kellermeyer Bergensons Services LLC, Commercial & Professional Services 1                              
Variable Rate [12],[13],[14],[15],[16],[18],[19],[34],[40] 6.00% 6.00% 6.00% 6.00% 6.00% 6.00% 6.00%                
Floor Rate [13],[14],[15],[16],[18],[19],[34],[40] 1.00% 1.00% 1.00% 1.00% 1.00% 1.00% 1.00%                
Principal Amount [13],[14],[15],[16],[17],[18],[19],[34],[40] $ 268.9                            
Amortized Cost [13],[14],[15],[16],[18],[19],[34],[40] 259.5                            
Fair Value [3],[13],[14],[15],[16],[18],[19],[34],[40] $ 244.6                            
Investment, Identifier [Axis]: Kellermeyer Bergensons Services LLC, Commercial & Professional Services 2                              
Variable Rate [12] 6.00% 6.00% 6.00% 6.00% 6.00% 6.00% 6.00%                
Floor Rate [15] 1.00% 1.00% 1.00% 1.00% 1.00% 1.00% 1.00%                
Principal Amount [15],[17] $ 84.6                            
Amortized Cost [15] 84.1                            
Fair Value [3],[15] $ 77.0                            
Investment, Identifier [Axis]: Kellermeyer Bergensons Services LLC, Commercial & Professional Services 3                              
Variable Rate [12] 6.00% 6.00% 6.00% 6.00% 6.00% 6.00% 6.00%                
Floor Rate [15] 1.00% 1.00% 1.00% 1.00% 1.00% 1.00% 1.00%                
Principal Amount [15],[17] $ 15.4                            
Amortized Cost [15] 15.3                            
Fair Value [3],[15] 14.0                            
Investment, Identifier [Axis]: Kellermeyer Bergensons Services LLC, Senior Secured Loans—First Lien, Commercial & Professional Services -1                              
Variable Rate [8],[9],[10],[32],[33],[38],[39],[43]               5.75% 5.75% 5.75% 5.75% 5.75% 5.75% 5.75%  
Floor Rate [8],[9],[10],[32],[33],[38],[39],[43]               1.00% 1.00% 1.00% 1.00% 1.00% 1.00% 1.00%  
Principal Amount [6],[8],[9],[10],[32],[33],[38],[39],[43]               $ 341.7              
Amortized Cost [8],[9],[10],[32],[33],[38],[39],[43]               329.6              
Fair Value [2],[8],[9],[10],[32],[33],[38],[39],[43]               $ 342.8              
Investment, Identifier [Axis]: Kellermeyer Bergensons Services LLC, Senior Secured Loans—First Lien, Commercial & Professional Services -2                              
Variable Rate [5]               5.75% 5.75% 5.75% 5.75% 5.75% 5.75% 5.75%  
Floor Rate [5]               1.00% 1.00% 1.00% 1.00% 1.00% 1.00% 1.00%  
Principal Amount [5],[6]               $ 31.0              
Amortized Cost [5]               31.0              
Fair Value [2],[5]               31.1              
Investment, Identifier [Axis]: Kilter Finance, Preferred Stock                              
Fair Value $ 99.5             $ 36.1             0.2
Investment, Identifier [Axis]: Kilter Finance, Preferred Stock, Insurance                              
Rate [7],[24],[31],[32]               6.00% 6.00% 6.00% 6.00% 6.00% 6.00% 6.00%  
PIK Rate 12.00% [12],[15],[29],[30] 12.00% [12],[15],[29],[30] 12.00% [12],[15],[29],[30] 12.00% [12],[15],[29],[30] 12.00% [12],[15],[29],[30] 12.00% [12],[15],[29],[30] 12.00% [12],[15],[29],[30] 6.00% [7],[24],[31],[32] 6.00% [7],[24],[31],[32] 6.00% [7],[24],[31],[32] 6.00% [7],[24],[31],[32] 6.00% [7],[24],[31],[32] 6.00% [7],[24],[31],[32] 6.00% [7],[24],[31],[32]  
Number of Shares | shares 99,400,000 [15],[29],[30] 99,400,000 [15],[29],[30] 99,400,000 [15],[29],[30] 99,400,000 [15],[29],[30] 99,400,000 [15],[29],[30] 99,400,000 [15],[29],[30] 99,400,000 [15],[29],[30] 36,108,611 [6],[24],[31],[32] 36,108,611 [6],[24],[31],[32] 36,108,611 [6],[24],[31],[32] 36,108,611 [6],[24],[31],[32] 36,108,611 [6],[24],[31],[32] 36,108,611 [6],[24],[31],[32] 36,108,611 [6],[24],[31],[32]  
Amortized Cost $ 98.6 [15],[29],[30]             $ 34.6 [24],[31],[32]              
Fair Value 99.5 [3],[15],[29],[30]             $ 36.1 [2],[24],[31],[32]              
Investment, Identifier [Axis]: Kilter Finance, Preferred Stock, Insurance | Maximum                              
PIK Rate [7],[24],[31],[32]               6.00% 6.00% 6.00% 6.00% 6.00% 6.00% 6.00%  
Investment, Identifier [Axis]: Kilter Finance, Private Equity                              
Fair Value $ 0.5             $ 0.5             $ 0.2
Investment, Identifier [Axis]: Kilter Finance, Private Equity, Insurance                              
Number of Shares | shares 536,709 [15],[28],[29],[30] 536,709 [15],[28],[29],[30] 536,709 [15],[28],[29],[30] 536,709 [15],[28],[29],[30] 536,709 [15],[28],[29],[30] 536,709 [15],[28],[29],[30] 536,709 [15],[28],[29],[30] 536,709 [6],[23],[24],[31],[32] 536,709 [6],[23],[24],[31],[32] 536,709 [6],[23],[24],[31],[32] 536,709 [6],[23],[24],[31],[32] 536,709 [6],[23],[24],[31],[32] 536,709 [6],[23],[24],[31],[32] 536,709 [6],[23],[24],[31],[32]  
Amortized Cost $ 0.5 [15],[28],[29],[30]             $ 0.5 [23],[24],[31],[32]              
Fair Value $ 0.5 [3],[15],[28],[29],[30]             $ 0.5 [2],[23],[24],[31],[32]              
Investment, Identifier [Axis]: Lakefield Veterinary Group, Health Care Equipment & Services 1                              
Variable Rate [12],[15],[16],[18] 5.50% 5.50% 5.50% 5.50% 5.50% 5.50% 5.50%                
Floor Rate [15],[16],[18] 0.80% 0.80% 0.80% 0.80% 0.80% 0.80% 0.80%                
Principal Amount [15],[16],[17],[18] $ 108.3                            
Amortized Cost [15],[16],[18] 107.6                            
Fair Value [3],[15],[16],[18] $ 103.8                            
Investment, Identifier [Axis]: Lakefield Veterinary Group, Health Care Equipment & Services 2                              
Variable Rate [4],[12] 5.50% 5.50% 5.50% 5.50% 5.50% 5.50% 5.50%                
Floor Rate [4] 0.80% 0.80% 0.80% 0.80% 0.80% 0.80% 0.80%                
Principal Amount [4],[17] $ 35.2                            
Amortized Cost [4] 35.2                            
Fair Value [3],[4] $ 33.7                            
Investment, Identifier [Axis]: Lakefield Veterinary Group, Senior Secured Loans—First Lien, Consumer Services -1                              
Variable Rate [10],[32]               5.50% 5.50% 5.50% 5.50% 5.50% 5.50% 5.50%  
Floor Rate [10],[32],[43]               0.80% 0.80% 0.80% 0.80% 0.80% 0.80% 0.80%  
Principal Amount [6],[10],[32],[43]               $ 115.6              
Amortized Cost [10],[32],[43]               114.5              
Fair Value [2],[10],[32],[43]               $ 114.6              
Investment, Identifier [Axis]: Lakefield Veterinary Group, Senior Secured Loans—First Lien, Consumer Services -2                              
Variable Rate [5]               5.50% 5.50% 5.50% 5.50% 5.50% 5.50% 5.50%  
Floor Rate [5]               0.80% 0.80% 0.80% 0.80% 0.80% 0.80% 0.80%  
Principal Amount [5],[6]               $ 56.3              
Amortized Cost [5]               56.3              
Fair Value [2],[5]               $ 55.7              
Investment, Identifier [Axis]: Lakeview Farms Inc, Food, Beverage & Tobacco 1                              
Variable Rate [12],[14],[15],[40] 6.25% 6.25% 6.25% 6.25% 6.25% 6.25% 6.25%                
Floor Rate [14],[40] 1.00% 1.00% 1.00% 1.00% 1.00% 1.00% 1.00%                
Principal Amount [14],[17],[40] $ 31.2                            
Amortized Cost [14],[40] 29.6                            
Fair Value [3],[14],[40] $ 30.2                            
Investment, Identifier [Axis]: Lakeview Farms Inc, Food, Beverage & Tobacco 2                              
Variable Rate [12],[15] 6.25% 6.25% 6.25% 6.25% 6.25% 6.25% 6.25%                
Floor Rate [15] 1.00% 1.00% 1.00% 1.00% 1.00% 1.00% 1.00%                
Principal Amount [15],[17] $ 4.5                            
Amortized Cost [15] 4.5                            
Fair Value [3],[15] $ 4.3                            
Investment, Identifier [Axis]: Lakeview Farms Inc, Food, Beverage & Tobacco 3                              
Variable Rate [12] 6.25% 6.25% 6.25% 6.25% 6.25% 6.25% 6.25%                
Floor Rate [15],[40] 1.00% 1.00% 1.00% 1.00% 1.00% 1.00% 1.00%                
Principal Amount [15],[17],[40] $ 45.0                            
Amortized Cost [15],[40] 45.0                            
Fair Value [3],[15],[40] $ 43.6                            
Investment, Identifier [Axis]: Lakeview Farms Inc, Food, Beverage & Tobacco 4                              
Variable Rate [4],[12] 6.25% 6.25% 6.25% 6.25% 6.25% 6.25% 6.25%                
Floor Rate [4] 1.00% 1.00% 1.00% 1.00% 1.00% 1.00% 1.00%                
Principal Amount [4],[17] $ 10.8                            
Amortized Cost [4] 10.8                            
Fair Value [3],[4] $ 10.5                            
Investment, Identifier [Axis]: Lakeview Farms Inc, Food, Beverage & Tobacco 5                              
Variable Rate [4],[12] 6.25% 6.25% 6.25% 6.25% 6.25% 6.25% 6.25%                
Floor Rate [4] 1.00% 1.00% 1.00% 1.00% 1.00% 1.00% 1.00%                
Principal Amount [4],[17] $ 2.3                            
Amortized Cost [4] 2.3                            
Fair Value [3],[4] $ 2.2                            
Investment, Identifier [Axis]: Lakeview Farms Inc, Senior Secured Loans—First Lien, Food, Beverage & Tobacco -1                              
Variable Rate [9],[32],[39]               6.25% 6.25% 6.25% 6.25% 6.25% 6.25% 6.25%  
Floor Rate [9],[32],[39]               1.00% 1.00% 1.00% 1.00% 1.00% 1.00% 1.00%  
Principal Amount [6],[9],[32],[39]               $ 77.0              
Amortized Cost [9],[32],[39]               75.1              
Fair Value [2],[9],[32],[39]               $ 76.5              
Investment, Identifier [Axis]: Lakeview Farms Inc, Senior Secured Loans—First Lien, Food, Beverage & Tobacco -2                              
Variable Rate [32]               6.25% 6.25% 6.25% 6.25% 6.25% 6.25% 6.25%  
Floor Rate [32]               1.00% 1.00% 1.00% 1.00% 1.00% 1.00% 1.00%  
Principal Amount [6],[32]               $ 3.4              
Amortized Cost [32]               3.4              
Fair Value [2],[32]               $ 3.4              
Investment, Identifier [Axis]: Lakeview Farms Inc, Senior Secured Loans—First Lien, Food, Beverage & Tobacco -3                              
Variable Rate [5]               6.25% 6.25% 6.25% 6.25% 6.25% 6.25% 6.25%  
Floor Rate [5]               1.00% 1.00% 1.00% 1.00% 1.00% 1.00% 1.00%  
Principal Amount [5],[6]               $ 10.8              
Amortized Cost [5]               10.8              
Fair Value [2],[5]               $ 10.8              
Investment, Identifier [Axis]: Lakeview Farms Inc, Senior Secured Loans—First Lien, Food, Beverage & Tobacco -4                              
Variable Rate [5]               6.25% 6.25% 6.25% 6.25% 6.25% 6.25% 6.25%  
Floor Rate [5]               1.00% 1.00% 1.00% 1.00% 1.00% 1.00% 1.00%  
Principal Amount [5],[6]               $ 3.4              
Amortized Cost [5]               3.4              
Fair Value [2],[5]               $ 3.4              
Investment, Identifier [Axis]: Lenovo Group Ltd, Structured Mezzanine, Technology Hardware & Equipment 1                              
Rate [7],[24],[32]               7.80% 7.80% 7.80% 7.80% 7.80% 7.80% 7.80%  
Principal Amount | € [6],[24],[32]                     € 7.8        
Amortized Cost [24],[32]               $ 9.2              
Fair Value [2],[24],[32]               $ 8.9              
Investment, Identifier [Axis]: Lenovo Group Ltd, Structured Mezzanine, Technology Hardware & Equipment 2                              
Rate [7],[24],[32]               7.80% 7.80% 7.80% 7.80% 7.80% 7.80% 7.80%  
Principal Amount [6],[24],[32]               $ 12.1              
Amortized Cost [24],[32]               12.1              
Fair Value [2],[24],[32]               $ 12.1              
Investment, Identifier [Axis]: Lenovo Group Ltd, Structured Mezzanine, Technology Hardware & Equipment 3                              
Rate [7],[24],[32]               11.80% 11.80% 11.80% 11.80% 11.80% 11.80% 11.80%  
Principal Amount | € [6],[24],[32]                     € 5.9        
Amortized Cost [24],[32]               $ 6.9              
Fair Value [2],[24],[32]               $ 6.7              
Investment, Identifier [Axis]: Lenovo Group Ltd, Structured Mezzanine, Technology Hardware & Equipment 4                              
Rate [7],[24],[32]               11.80% 11.80% 11.80% 11.80% 11.80% 11.80% 11.80%  
Principal Amount | £ [6],[24],[32]                       £ 1.6      
Amortized Cost [24],[32]               $ 2.2              
Fair Value [2],[24],[32]               $ 2.1              
Investment, Identifier [Axis]: Lenovo Group Ltd, Structured Mezzanine, Technology Hardware & Equipment 5                              
Rate [7],[24],[32]               7.80% 7.80% 7.80% 7.80% 7.80% 7.80% 7.80%  
Principal Amount | £ [6],[24],[32]                       £ 2.1      
Amortized Cost [24],[32]               $ 2.9              
Fair Value [2],[24],[32]               $ 2.9              
Investment, Identifier [Axis]: Lenovo Group Ltd, Structured Mezzanine, Technology Hardware & Equipment 6                              
Rate [7],[24],[32]               11.80% 11.80% 11.80% 11.80% 11.80% 11.80% 11.80%  
Principal Amount [6],[24],[32]               $ 9.1              
Amortized Cost [24],[32]               9.1              
Fair Value [2],[24],[32]               $ 9.1              
Investment, Identifier [Axis]: Lexitas Inc, Commercial & Professional Services 1                              
Variable Rate [12],[15] 6.75% 6.75% 6.75% 6.75% 6.75% 6.75% 6.75%                
Floor Rate [13],[14],[15],[16],[40] 1.00% 1.00% 1.00% 1.00% 1.00% 1.00% 1.00%                
Principal Amount [13],[14],[15],[16],[17],[40] $ 133.1                            
Amortized Cost [13],[14],[15],[16],[40] 130.2                            
Fair Value [3],[13],[14],[15],[16],[40] $ 131.1                            
Investment, Identifier [Axis]: Lexitas Inc, Commercial & Professional Services 2                              
Variable Rate [12],[13],[14],[15],[16],[40] 6.75% 6.75% 6.75% 6.75% 6.75% 6.75% 6.75%                
Floor Rate [4] 1.00% 1.00% 1.00% 1.00% 1.00% 1.00% 1.00%                
Principal Amount [4],[17] $ 8.4                            
Amortized Cost [4] 8.4                            
Fair Value [3],[4] $ 8.3                            
Investment, Identifier [Axis]: Lexitas Inc, Senior Secured Loans—First Lien, Commercial & Professional Services -1                              
Variable Rate [8],[9],[10],[32],[39]               6.00% 6.00% 6.00% 6.00% 6.00% 6.00% 6.00%  
Floor Rate [8],[9],[10],[32],[39]               1.00% 1.00% 1.00% 1.00% 1.00% 1.00% 1.00%  
Principal Amount [6],[8],[9],[10],[32],[39]               $ 106.8              
Amortized Cost [8],[9],[10],[32],[39]               103.3              
Fair Value [2],[8],[9],[10],[32],[39]               $ 107.8              
Investment, Identifier [Axis]: Lexitas Inc, Senior Secured Loans—First Lien, Commercial & Professional Services -2                              
Variable Rate [5]               6.00% 6.00% 6.00% 6.00% 6.00% 6.00% 6.00%  
Floor Rate [5]               1.00% 1.00% 1.00% 1.00% 1.00% 1.00% 1.00%  
Principal Amount [5],[6]               $ 10.3              
Amortized Cost [5]               10.3              
Fair Value [2],[5]               $ 10.4              
Investment, Identifier [Axis]: Lexitas Inc, Senior Secured Loans—First Lien, Commercial & Professional Services -3                              
Variable Rate [5]               6.00% 6.00% 6.00% 6.00% 6.00% 6.00% 6.00%  
Floor Rate [5]               1.00% 1.00% 1.00% 1.00% 1.00% 1.00% 1.00%  
Principal Amount [5],[6]               $ 5.4              
Amortized Cost [5]               5.4              
Fair Value [2],[5]               $ 5.4              
Investment, Identifier [Axis]: Lionbridge Technologies Inc                              
Variable Rate [8],[33],[38],[43]               7.00% 7.00% 7.00% 7.00% 7.00% 7.00% 7.00%  
Floor Rate [8],[9],[32],[39],[43]               1.00% 1.00% 1.00% 1.00% 1.00% 1.00% 1.00%  
Principal Amount [6],[8],[9],[32],[39],[43]               $ 68.9              
Amortized Cost [8],[9],[32],[39],[43]               64.0              
Fair Value [2],[8],[9],[32],[39],[43]               $ 70.3              
Investment, Identifier [Axis]: Lionbridge Technologies Inc, Media & Entertainment                              
Variable Rate [12],[13],[15],[18],[19],[34],[40] 7.00% 7.00% 7.00% 7.00% 7.00% 7.00% 7.00%                
Floor Rate [13],[15],[18],[19],[34],[40] 1.00% 1.00% 1.00% 1.00% 1.00% 1.00% 1.00%                
Principal Amount [13],[15],[17],[18],[19],[34],[40] $ 122.7                            
Amortized Cost [13],[15],[18],[19],[34],[40] 119.0                            
Fair Value [3],[13],[15],[18],[19],[34],[40] $ 123.4                            
Investment, Identifier [Axis]: Lipari Foods LLC                              
Variable Rate [32],[33],[39],[43]               5.75% 5.75% 5.75% 5.75% 5.75% 5.75% 5.75%  
Floor Rate [32],[33],[39],[43]               1.00% 1.00% 1.00% 1.00% 1.00% 1.00% 1.00%  
Principal Amount [6],[32],[33],[39],[43]               $ 272.0              
Amortized Cost [32],[33],[39],[43]               261.2              
Fair Value [2],[32],[33],[39],[43]               $ 272.0              
Investment, Identifier [Axis]: Lipari Foods LLC, Common Stock, Food & Staples Retailing                              
Number of Shares | shares [15],[28] 7,936,123 7,936,123 7,936,123 7,936,123 7,936,123 7,936,123 7,936,123                
Amortized Cost [15],[28] $ 8.0                            
Fair Value [1],[15],[28] $ 8.0                            
Investment, Identifier [Axis]: Lipari Foods LLC, Food & Staples Retailing 1                              
Variable Rate [12],[15],[18],[34],[40] 6.50% 6.50% 6.50% 6.50% 6.50% 6.50% 6.50%                
Floor Rate [15],[16],[18] 1.00% 1.00% 1.00% 1.00% 1.00% 1.00% 1.00%                
Principal Amount [15],[16],[17],[18] $ 96.0                            
Amortized Cost [15],[16],[18] 94.6                            
Fair Value [3],[15],[16],[18] $ 94.9                            
Investment, Identifier [Axis]: Lipari Foods LLC, Food & Staples Retailing 2                              
Variable Rate [12],[15],[18],[34] 6.50% 6.50% 6.50% 6.50% 6.50% 6.50% 6.50%                
Floor Rate [4] 1.00% 1.00% 1.00% 1.00% 1.00% 1.00% 1.00%                
Principal Amount [4],[17] $ 27.3                            
Amortized Cost [4] 27.3                            
Fair Value [3],[4] $ 27.0                            
Investment, Identifier [Axis]: Lloyd's Register Quality Assurance Ltd                              
Variable Rate [5],[24]               6.00% 6.00% 6.00% 6.00% 6.00% 6.00% 6.00%  
PIK Rate [5],[24]               0.00% 0.00% 0.00% 0.00% 0.00% 0.00% 0.00%  
Floor Rate [5],[24]               0.00% 0.00% 0.00% 0.00% 0.00% 0.00% 0.00%  
Principal Amount | £ [5],[6],[24]                       £ 15.0      
Amortized Cost [5],[24]               $ 20.0              
Fair Value [2],[5],[24]               $ 19.7              
Investment, Identifier [Axis]: Lloyd's Register Quality Assurance Ltd | Maximum                              
PIK Rate [5],[24]               6.30% 6.30% 6.30% 6.30% 6.30% 6.30% 6.30%  
Investment, Identifier [Axis]: Lloyd's Register Quality Assurance Ltd, Consumer Services 1                              
Variable Rate [12],[15],[29] 5.75% 5.75% 5.75% 5.75% 5.75% 5.75% 5.75%                
PIK Rate [12],[15],[29] 0.00% 0.00% 0.00% 0.00% 0.00% 0.00% 0.00%                
Floor Rate [15],[29] 0.00% 0.00% 0.00% 0.00% 0.00% 0.00% 0.00%                
Principal Amount | £ [15],[17],[29]         £ 5.7                    
Amortized Cost [15],[29] $ 7.4                            
Fair Value [3],[15],[29] $ 6.7                            
Investment, Identifier [Axis]: Lloyd's Register Quality Assurance Ltd, Consumer Services 1 | Maximum                              
PIK Rate [12],[15],[29] 2.90% 2.90% 2.90% 2.90% 2.90% 2.90% 2.90%                
Investment, Identifier [Axis]: Lloyd's Register Quality Assurance Ltd, Consumer Services 2                              
Variable Rate [4],[12],[29] 5.75% 5.75% 5.75% 5.75% 5.75% 5.75% 5.75%                
PIK Rate [4],[12],[29] 0.00% 0.00% 0.00% 0.00% 0.00% 0.00% 0.00%                
Floor Rate [4],[29] 0.00% 0.00% 0.00% 0.00% 0.00% 0.00% 0.00%                
Principal Amount | £ [4],[17],[29]         £ 9.3                    
Amortized Cost [4],[29] $ 12.6                            
Fair Value [3],[4],[29] $ 12.3                            
Investment, Identifier [Axis]: Lloyd's Register Quality Assurance Ltd, Consumer Services 2 | Maximum                              
PIK Rate [4],[12],[29] 2.90% 2.90% 2.90% 2.90% 2.90% 2.90% 2.90%                
Investment, Identifier [Axis]: Luxembourg Life Fund - Absolute Return Fund II, Structured Mezzanine, Insurance                              
Variable Rate [12],[15],[29] 7.50% 7.50% 7.50% 7.50% 7.50% 7.50% 7.50%                
Floor Rate [15],[29] 0.50% 0.50% 0.50% 0.50% 0.50% 0.50% 0.50%                
Principal Amount [15],[17],[29] $ 24.9                            
Amortized Cost [15],[29] 24.9                            
Fair Value [3],[15],[29] $ 24.6                            
Investment, Identifier [Axis]: MB Precision Holdings LLC, Class A - 2 Units, Capital Goods                              
Number of Shares | shares 8,081,288 [28],[51],[55] 8,081,288 [28],[51],[55] 8,081,288 [28],[51],[55] 8,081,288 [28],[51],[55] 8,081,288 [28],[51],[55] 8,081,288 [28],[51],[55] 8,081,288 [28],[51],[55] 8,081,288 [23],[50],[56] 8,081,288 [23],[50],[56] 8,081,288 [23],[50],[56] 8,081,288 [23],[50],[56] 8,081,288 [23],[50],[56] 8,081,288 [23],[50],[56] 8,081,288 [23],[50],[56]  
Amortized Cost $ 0.5 [28],[51],[55]             $ 0.5 [23],[50],[56]              
Fair Value $ 0.0 [1],[28],[51],[55]             $ 0.0 [2],[23],[50],[56]              
Investment, Identifier [Axis]: MB2 Dental Solutions LLC, Health Care Equipment & Services                              
Variable Rate [12],[13],[14],[15],[19],[40] 6.00% 6.00% 6.00% 6.00% 6.00% 6.00% 6.00%                
Floor Rate [13],[14],[15],[19],[40] 1.00% 1.00% 1.00% 1.00% 1.00% 1.00% 1.00%                
Principal Amount [13],[14],[15],[17],[19],[40] $ 268.0                            
Amortized Cost [13],[14],[15],[19],[40] 259.2                            
Fair Value [3],[13],[14],[15],[19],[40] $ 263.6                            
Investment, Identifier [Axis]: MB2 Dental Solutions LLC, Senior Secured Loans—First Lien, Health Care Equipment & Services -1                              
Variable Rate [8],[9],[32],[38],[39]               6.00% 6.00% 6.00% 6.00% 6.00% 6.00% 6.00%  
Floor Rate [8],[9],[32],[38],[39]               1.00% 1.00% 1.00% 1.00% 1.00% 1.00% 1.00%  
Principal Amount [6],[8],[9],[32],[38],[39]               $ 231.0              
Amortized Cost [8],[9],[32],[38],[39]               220.3              
Fair Value [2],[8],[9],[32],[38],[39]               $ 231.7              
Investment, Identifier [Axis]: MB2 Dental Solutions LLC, Senior Secured Loans—First Lien, Health Care Equipment & Services -2                              
Variable Rate [5]               6.00% 6.00% 6.00% 6.00% 6.00% 6.00% 6.00%  
Floor Rate [5]               1.00% 1.00% 1.00% 1.00% 1.00% 1.00% 1.00%  
Principal Amount [5],[6]               $ 56.7              
Amortized Cost [5]               56.7              
Fair Value [2],[5]               $ 56.9              
Investment, Identifier [Axis]: Magna Legal Services LLC, Commercial & Professional Services 1                              
Variable Rate [12] 6.50% 6.50% 6.50% 6.50% 6.50% 6.50% 6.50%                
Floor Rate [15] 0.80% 0.80% 0.80% 0.80% 0.80% 0.80% 0.80%                
Principal Amount [15],[17] $ 18.5                            
Amortized Cost [15] 18.2                            
Fair Value [3],[15] $ 18.2                            
Investment, Identifier [Axis]: Magna Legal Services LLC, Commercial & Professional Services 2                              
Variable Rate [12] 6.50% 6.50% 6.50% 6.50% 6.50% 6.50% 6.50%                
Floor Rate [4] 0.80% 0.80% 0.80% 0.80% 0.80% 0.80% 0.80%                
Principal Amount [4],[17] $ 2.2                            
Amortized Cost [4] 2.2                            
Fair Value [3],[4] $ 2.1                            
Investment, Identifier [Axis]: Magna Legal Services LLC, Commercial & Professional Services 3                              
Variable Rate [12] 6.50% 6.50% 6.50% 6.50% 6.50% 6.50% 6.50%                
Floor Rate [4] 0.80% 0.80% 0.80% 0.80% 0.80% 0.80% 0.80%                
Principal Amount [4],[17] $ 5.2                            
Amortized Cost [4] 5.2                            
Fair Value [3],[4] $ 5.1                            
Investment, Identifier [Axis]: Magna Legal Services LLC, Common Stock, Commercial & Professional Services                              
Number of Shares | shares [28],[47] 4,938,192 4,938,192 4,938,192 4,938,192 4,938,192 4,938,192 4,938,192                
Amortized Cost [28],[47] $ 4.9                            
Fair Value [1],[28],[47] $ 4.9                            
Investment, Identifier [Axis]: Matchesfashion Ltd                              
Variable Rate [24],[32]               4.63% 4.63% 4.63% 4.63% 4.63% 4.63% 4.63%  
PIK Rate [24],[32]               3.00% 3.00% 3.00% 3.00% 3.00% 3.00% 3.00%  
Floor Rate [24],[32]               0.00% 0.00% 0.00% 0.00% 0.00% 0.00% 0.00%  
Principal Amount [6],[24],[32]               $ 12.9              
Amortized Cost [24],[32]               12.4              
Fair Value [2],[24],[32]               $ 8.2              
Investment, Identifier [Axis]: Matchesfashion Ltd | Maximum                              
PIK Rate [24],[32]               3.00% 3.00% 3.00% 3.00% 3.00% 3.00% 3.00%  
Investment, Identifier [Axis]: Matchesfashion Ltd, Consumer Durables & Apparel                              
Variable Rate [12],[15],[25],[28],[29] 4.63% 4.63% 4.63% 4.63% 4.63% 4.63% 4.63%                
PIK Rate [12],[15],[25],[28],[29] 3.00% 3.00% 3.00% 3.00% 3.00% 3.00% 3.00%                
Floor Rate [15],[25],[28],[29] 0.00% 0.00% 0.00% 0.00% 0.00% 0.00% 0.00%                
Principal Amount [15],[17],[25],[28],[29] $ 13.3                            
Amortized Cost [15],[25],[28],[29] 12.2                            
Fair Value [3],[15],[25],[28],[29] $ 4.8                            
Investment, Identifier [Axis]: Matchesfashion Ltd, Consumer Durables & Apparel | Maximum                              
PIK Rate [12],[15],[25],[28],[29] 3.00% 3.00% 3.00% 3.00% 3.00% 3.00% 3.00%                
Investment, Identifier [Axis]: Maverick Natural Resources LLC, Common Stock, Energy                              
Number of Shares | shares 259,211 [51],[55] 259,211 [51],[55] 259,211 [51],[55] 259,211 [51],[55] 259,211 [51],[55] 259,211 [51],[55] 259,211 [51],[55] 259,211 [23],[50],[56] 259,211 [23],[50],[56] 259,211 [23],[50],[56] 259,211 [23],[50],[56] 259,211 [23],[50],[56] 259,211 [23],[50],[56] 259,211 [23],[50],[56]  
Amortized Cost $ 84.6 [51],[55]             $ 84.5 [23],[50],[56]              
Fair Value $ 160.9 [1],[51],[55]             $ 143.6 [2],[23],[50],[56]              
Investment, Identifier [Axis]: Med-Metrix, Common Stock, Software & Services                              
Number of Shares | shares 29,403 [28],[47] 29,403 [28],[47] 29,403 [28],[47] 29,403 [28],[47] 29,403 [28],[47] 29,403 [28],[47] 29,403 [28],[47] 29,403 [23],[46] 29,403 [23],[46] 29,403 [23],[46] 29,403 [23],[46] 29,403 [23],[46] 29,403 [23],[46] 29,403 [23],[46]  
Amortized Cost $ 1.5 [28],[47]             $ 1.5 [23],[46]              
Fair Value $ 2.9 [1],[28],[47]             $ 1.6 [2],[23],[46]              
Investment, Identifier [Axis]: Med-Metrix, Preferred Stock, Software & Services                              
PIK Rate 8.00% [12],[47] 8.00% [12],[47] 8.00% [12],[47] 8.00% [12],[47] 8.00% [12],[47] 8.00% [12],[47] 8.00% [12],[47]               8.00% [7],[46]
Number of Shares | shares 29,403 [47] 29,403 [47] 29,403 [47] 29,403 [47] 29,403 [47] 29,403 [47] 29,403 [47] 29,403 [23],[32] 29,403 [23],[32] 29,403 [23],[32] 29,403 [23],[32] 29,403 [23],[32] 29,403 [23],[32] 29,403 [23],[32]  
Amortized Cost $ 1.5 [47]             $ 1.5 [23],[32]              
Fair Value $ 1.5 [1],[47]             $ 1.5 [2],[23],[32]              
Investment, Identifier [Axis]: Med-Metrix, Preferred Stock, Software & Services | Maximum                              
PIK Rate 8.00% [12],[47] 8.00% [12],[47] 8.00% [12],[47] 8.00% [12],[47] 8.00% [12],[47] 8.00% [12],[47] 8.00% [12],[47]               8.00% [7],[46]
Investment, Identifier [Axis]: Med-Metrix, Senior Secured Loans—First Lien, Software & Services -1                              
Variable Rate [32]               6.00% 6.00% 6.00% 6.00% 6.00% 6.00% 6.00%  
Floor Rate [32]               1.00% 1.00% 1.00% 1.00% 1.00% 1.00% 1.00%  
Principal Amount [6],[32]               $ 62.4              
Amortized Cost [32]               61.8              
Fair Value [2],[32]               $ 61.9              
Investment, Identifier [Axis]: Med-Metrix, Senior Secured Loans—First Lien, Software & Services -2                              
Variable Rate [5]               6.00% 6.00% 6.00% 6.00% 6.00% 6.00% 6.00%  
Floor Rate [5]               1.00% 1.00% 1.00% 1.00% 1.00% 1.00% 1.00%  
Principal Amount [5],[6]               $ 31.3              
Amortized Cost [5]               31.3              
Fair Value [2],[5]               $ 31.0              
Investment, Identifier [Axis]: Med-Metrix, Senior Secured Loans—First Lien, Software & Services -3                              
Variable Rate [5]               6.00% 6.00% 6.00% 6.00% 6.00% 6.00% 6.00%  
Floor Rate [5]               1.00% 1.00% 1.00% 1.00% 1.00% 1.00% 1.00%  
Principal Amount [5],[6]               $ 7.8              
Amortized Cost [5]               7.8              
Fair Value [2],[5]               $ 7.8              
Investment, Identifier [Axis]: Med-Metrix, Software & Services 1                              
Variable Rate [12],[15] 6.00% 6.00% 6.00% 6.00% 6.00% 6.00% 6.00%                
Floor Rate [15],[16],[19] 1.00% 1.00% 1.00% 1.00% 1.00% 1.00% 1.00%                
Principal Amount [15],[16],[17],[19] $ 56.1                            
Amortized Cost [15],[16],[19] 56.1                            
Fair Value [3],[15],[16],[19] $ 56.6                            
Investment, Identifier [Axis]: Med-Metrix, Software & Services 2                              
Variable Rate [4],[12] 6.00% 6.00% 6.00% 6.00% 6.00% 6.00% 6.00%                
Floor Rate [4] 1.00% 1.00% 1.00% 1.00% 1.00% 1.00% 1.00%                
Principal Amount [4],[17] $ 25.0                            
Amortized Cost [4] 25.0                            
Fair Value [3],[4] $ 25.3                            
Investment, Identifier [Axis]: Med-Metrix, Software & Services 3                              
Variable Rate [4],[12] 6.00% 6.00% 6.00% 6.00% 6.00% 6.00% 6.00%                
Floor Rate [4] 1.00% 1.00% 1.00% 1.00% 1.00% 1.00% 1.00%                
Principal Amount [4],[17] $ 7.8                            
Amortized Cost [4] 7.8                            
Fair Value [3],[4] $ 7.8                            
Investment, Identifier [Axis]: Medallia Inc                              
PIK Rate [32]               6.75% 6.75% 6.75% 6.75% 6.75% 6.75% 6.75%  
Floor Rate [32]               0.80% 0.80% 0.80% 0.80% 0.80% 0.80% 0.80%  
Principal Amount [6],[32]               $ 147.9              
Amortized Cost [32]               146.5              
Fair Value [2],[32]               $ 146.5              
Investment, Identifier [Axis]: Medallia Inc | Maximum                              
PIK Rate [32]               6.75% 6.75% 6.75% 6.75% 6.75% 6.75% 6.75%  
Investment, Identifier [Axis]: Medallia Inc, Software & Services                              
Variable Rate [12] 3.25% 3.25% 3.25% 3.25% 3.25% 3.25% 3.25%                
PIK Rate [12],[15] 3.30% 3.30% 3.30% 3.30% 3.30% 3.30% 3.30%                
Floor Rate [15] 0.80% 0.80% 0.80% 0.80% 0.80% 0.80% 0.80%                
Principal Amount [15],[17] $ 207.8                            
Amortized Cost [15] 205.8                            
Fair Value [3],[15] $ 203.0                            
Investment, Identifier [Axis]: Medallia Inc, Software & Services | Maximum                              
PIK Rate [12],[15] 3.30% 3.30% 3.30% 3.30% 3.30% 3.30% 3.30%                
Investment, Identifier [Axis]: Miami Beach Medical Group LLC                              
Variable Rate [8],[9],[32],[38],[39]               6.50% 6.50% 6.50% 6.50% 6.50% 6.50% 6.50%  
Floor Rate [8],[9],[32],[38],[39]               1.00% 1.00% 1.00% 1.00% 1.00% 1.00% 1.00%  
Principal Amount [6],[8],[9],[32],[38],[39]               $ 180.6              
Amortized Cost [8],[9],[32],[38],[39]               171.4              
Fair Value [2],[8],[9],[32],[38],[39]               $ 178.6              
Investment, Identifier [Axis]: Miami Beach Medical Group LLC, Common Stock, Health Care Equipment & Services                              
Number of Shares | shares 5,000,000 [15],[28] 5,000,000 [15],[28] 5,000,000 [15],[28] 5,000,000 [15],[28] 5,000,000 [15],[28] 5,000,000 [15],[28] 5,000,000 [15],[28] 5,000,000 [23],[32] 5,000,000 [23],[32] 5,000,000 [23],[32] 5,000,000 [23],[32] 5,000,000 [23],[32] 5,000,000 [23],[32] 5,000,000 [23],[32]  
Amortized Cost $ 4.8 [15],[28]             $ 4.8 [23],[32]              
Fair Value $ 0.0 [1],[15],[28]             $ 3.9 [2],[23],[32]              
Investment, Identifier [Axis]: Miami Beach Medical Group LLC, Health Care Equipment & Services                              
Variable Rate [12],[13],[14],[15],[19],[40] 6.50% 6.50% 6.50% 6.50% 6.50% 6.50% 6.50%                
PIK Rate [12],[13],[14],[15],[19],[40] 1.50% 1.50% 1.50% 1.50% 1.50% 1.50% 1.50%                
Floor Rate [15],[40] 1.00% 1.00% 1.00% 1.00% 1.00% 1.00% 1.00%                
Principal Amount [15],[17],[40] $ 164.4                            
Amortized Cost [15],[40] 157.1                            
Fair Value [3],[15],[40] $ 139.8                            
Investment, Identifier [Axis]: Miami Beach Medical Group LLC, Health Care Equipment & Services | Maximum                              
PIK Rate [12],[13],[14],[15],[19],[40] 1.50% 1.50% 1.50% 1.50% 1.50% 1.50% 1.50%                
Investment, Identifier [Axis]: Micronics Filtration Holdings Inc                              
PIK Rate [32],[42]               7.50% 7.50% 7.50% 7.50% 7.50% 7.50% 7.50%  
Principal Amount [6],[32],[42]               $ 51.4              
Amortized Cost [32],[42]               46.0              
Fair Value $ 0.0             $ 51.0 [2],[32],[42]             $ 35.5
Investment, Identifier [Axis]: Micronics Filtration Holdings Inc | Maximum                              
PIK Rate [32],[42]               7.50% 7.50% 7.50% 7.50% 7.50% 7.50% 7.50%  
Investment, Identifier [Axis]: Micronics Filtration Holdings Inc, Common Stock                              
Fair Value 0.0             $ 0.0             0.0
Investment, Identifier [Axis]: Micronics Filtration Holdings Inc, Common Stock, Capital Goods                              
Number of Shares | shares [23],[32],[42]               53,073 53,073 53,073 53,073 53,073 53,073 53,073  
Amortized Cost [23],[32],[42]               $ 0.6              
Fair Value [2],[23],[32],[42]               0.0              
Investment, Identifier [Axis]: Micronics Filtration Holdings Inc, Preferred Stock, Series A                              
Fair Value 0.0             $ 0.1             0.0
Investment, Identifier [Axis]: Micronics Filtration Holdings Inc, Preferred Stock, Series A, Capital Goods                              
Number of Shares | shares [23],[32],[42]               55 55 55 55 55 55 55  
Amortized Cost [23],[32],[42]               $ 0.6              
Fair Value [2],[23],[32],[42]               0.1              
Investment, Identifier [Axis]: Micronics Filtration Holdings Inc, Preferred Stock, Series B                              
Fair Value 0.0             0.4             0.0
Investment, Identifier [Axis]: Micronics Filtration Holdings Inc, Preferred Stock, Series B PIK                              
Fair Value 0.0             $ 11.9             0.0
Investment, Identifier [Axis]: Micronics Filtration Holdings Inc, Preferred Stock, Series B PIK, Capital Goods                              
Number of Shares | shares [23],[32],[42]               112,780 112,780 112,780 112,780 112,780 112,780 112,780  
Amortized Cost [23],[32],[42]               $ 0.0              
Fair Value [2],[23],[32],[42]               $ 11.9              
Investment, Identifier [Axis]: Micronics Filtration Holdings Inc, Preferred Stock, Series B, Capital Goods                              
Number of Shares | shares [23],[32],[42]               23 23 23 23 23 23 23  
Amortized Cost [23],[32],[42]               $ 0.2              
Fair Value [2],[23],[32],[42]               0.4              
Investment, Identifier [Axis]: Micronics Filtration Holdings Inc, Preferred Stock, Series C PIK                              
Fair Value $ 0.0             $ 6.2             0.0
Investment, Identifier [Axis]: Micronics Filtration Holdings Inc, Preferred Stock, Series C PIK, Capital Goods                              
Number of Shares | shares [23],[32],[42]               54,000 54,000 54,000 54,000 54,000 54,000 54,000  
Amortized Cost [23],[32],[42]               $ 0.0              
Fair Value [2],[23],[32],[42]               $ 6.2              
Investment, Identifier [Axis]: Misys Ltd                              
Variable Rate [24],[32],[36]               7.25% 7.25% 7.25% 7.25% 7.25% 7.25% 7.25%  
Floor Rate [24],[32],[36]               1.00% 1.00% 1.00% 1.00% 1.00% 1.00% 1.00%  
Principal Amount [6],[24],[32],[36]               $ 21.8              
Amortized Cost [24],[32],[36]               20.5              
Fair Value [2],[24],[32],[36]               $ 21.8              
Investment, Identifier [Axis]: Misys Ltd, Preferred Stock                              
PIK Rate 10.25% 10.25% 10.25% 10.25% 10.25% 10.25% 10.25%                
Investment, Identifier [Axis]: Misys Ltd, Preferred Stock | Maximum                              
PIK Rate 10.25% 10.25% 10.25% 10.25% 10.25% 10.25% 10.25%                
Investment, Identifier [Axis]: Misys Ltd, Preferred Stock, Software & Services                              
PIK Rate 10.25% [12],[15],[29] 10.25% [12],[15],[29] 10.25% [12],[15],[29] 10.25% [12],[15],[29] 10.25% [12],[15],[29] 10.25% [12],[15],[29] 10.25% [12],[15],[29] 102500.00% [7],[24],[32] 102500.00% [7],[24],[32] 102500.00% [7],[24],[32] 102500.00% [7],[24],[32] 102500.00% [7],[24],[32] 102500.00% [7],[24],[32] 102500.00% [7],[24],[32]  
Floor Rate [15],[29] 0.00% 0.00% 0.00% 0.00% 0.00% 0.00% 0.00%                
Number of Shares | shares 65,200,765 [15],[29] 65,200,765 [15],[29] 65,200,765 [15],[29] 65,200,765 [15],[29] 65,200,765 [15],[29] 65,200,765 [15],[29] 65,200,765 [15],[29] 79,782,377 [24],[32] 79,782,377 [24],[32] 79,782,377 [24],[32] 79,782,377 [24],[32] 79,782,377 [24],[32] 79,782,377 [24],[32] 79,782,377 [24],[32]  
Amortized Cost $ 61.1 [15],[29]             $ 73.5 [24],[32]              
Fair Value $ 61.1 [1],[15],[29]             $ 78.9 [2],[24],[32]              
Investment, Identifier [Axis]: Misys Ltd, Preferred Stock, Software & Services | Maximum                              
PIK Rate 10.25% [12],[15],[29] 10.25% [12],[15],[29] 10.25% [12],[15],[29] 10.25% [12],[15],[29] 10.25% [12],[15],[29] 10.25% [12],[15],[29] 10.25% [12],[15],[29] 102500.00% [7],[24],[32] 102500.00% [7],[24],[32] 102500.00% [7],[24],[32] 102500.00% [7],[24],[32] 102500.00% [7],[24],[32] 102500.00% [7],[24],[32] 102500.00% [7],[24],[32]  
Investment, Identifier [Axis]: Misys Ltd, Software & Services                              
Variable Rate [12] 7.25% 7.25% 7.25% 7.25% 7.25% 7.25% 7.25%                
Floor Rate [15],[29],[37] 1.00% 1.00% 1.00% 1.00% 1.00% 1.00% 1.00%                
Principal Amount [15],[17],[29],[37] $ 16.3                            
Amortized Cost [15],[29],[37] 15.6                            
Fair Value [3],[15],[29],[37] $ 12.3                            
Investment, Identifier [Axis]: Monitronics International Inc, Commercial & Professional Services 1                              
Variable Rate [12],[15],[37] 7.50% 7.50% 7.50% 7.50% 7.50% 7.50% 7.50%                
Floor Rate [15],[18],[37] 1.30% 1.30% 1.30% 1.30% 1.30% 1.30% 1.30%                
Principal Amount [15],[17],[18],[37] $ 18.6                            
Amortized Cost [15],[18],[37] 17.7                            
Fair Value [3],[15],[18],[37] $ 12.5                            
Investment, Identifier [Axis]: Monitronics International Inc, Commercial & Professional Services 2                              
Variable Rate [12],[15] 6.00% 6.00% 6.00% 6.00% 6.00% 6.00% 6.00%                
Floor Rate [15] 1.50% 1.50% 1.50% 1.50% 1.50% 1.50% 1.50%                
Principal Amount [15],[17] $ 46.1                            
Amortized Cost [15] 44.3                            
Fair Value [3],[15] $ 42.3                            
Investment, Identifier [Axis]: Monitronics International Inc, Commercial & Professional Services 3                              
Variable Rate [4],[12] 6.00% 6.00% 6.00% 6.00% 6.00% 6.00% 6.00%                
Floor Rate [4] 1.50% 1.50% 1.50% 1.50% 1.50% 1.50% 1.50%                
Principal Amount [4],[17] $ 23.9                            
Amortized Cost [4] 23.9                            
Fair Value [3],[4] $ 21.9                            
Investment, Identifier [Axis]: Monitronics International Inc, Senior Secured Loans—First Lien, Commercial & Professional Services -1                              
Variable Rate [32],[36],[43]               6.50% 6.50% 6.50% 6.50% 6.50% 6.50% 6.50%  
Floor Rate [32],[36],[43]               1.30% 1.30% 1.30% 1.30% 1.30% 1.30% 1.30%  
Principal Amount [6],[32],[36],[43]               $ 18.8              
Amortized Cost [32],[36],[43]               17.2              
Fair Value [2],[32],[36],[43]               $ 17.7              
Investment, Identifier [Axis]: Monitronics International Inc, Senior Secured Loans—First Lien, Commercial & Professional Services -2                              
Variable Rate [32]               5.00% 5.00% 5.00% 5.00% 5.00% 5.00% 5.00%  
Floor Rate [32]               1.50% 1.50% 1.50% 1.50% 1.50% 1.50% 1.50%  
Principal Amount [6],[32]               $ 47.3              
Amortized Cost [32]               44.8              
Fair Value [2],[32]               $ 45.1              
Investment, Identifier [Axis]: Monitronics International Inc, Senior Secured Loans—First Lien, Commercial & Professional Services -3                              
Variable Rate [5]               5.00% 5.00% 5.00% 5.00% 5.00% 5.00% 5.00%  
Floor Rate [5]               1.50% 1.50% 1.50% 1.50% 1.50% 1.50% 1.50%  
Principal Amount [5],[6]               $ 22.7              
Amortized Cost [5]               22.7              
Fair Value [2],[5]               $ 21.6              
Investment, Identifier [Axis]: Motion Recruitment Partners LLC, Commercial & Professional Services 1                              
Variable Rate [12],[15],[16],[18] 6.50% 6.50% 6.50% 6.50% 6.50% 6.50% 6.50%                
Floor Rate [15],[16],[18] 1.00% 1.00% 1.00% 1.00% 1.00% 1.00% 1.00%                
Principal Amount [15],[16],[17],[18] $ 64.0                            
Amortized Cost [15],[16],[18] 64.0                            
Fair Value [3],[15],[16],[18] $ 63.6                            
Investment, Identifier [Axis]: Motion Recruitment Partners LLC, Commercial & Professional Services 2                              
Variable Rate [12],[15],[19],[40] 6.50% 6.50% 6.50% 6.50% 6.50% 6.50% 6.50%                
Floor Rate [15],[19],[40] 1.00% 1.00% 1.00% 1.00% 1.00% 1.00% 1.00%                
Principal Amount [15],[17],[19],[40] $ 59.4                            
Amortized Cost [15],[19],[40] 55.8                            
Fair Value [3],[15],[19],[40] $ 59.0                            
Investment, Identifier [Axis]: Motion Recruitment Partners LLC, Commercial & Professional Services 3                              
Variable Rate [12],[15] 6.50% 6.50% 6.50% 6.50% 6.50% 6.50% 6.50%                
Floor Rate [4] 1.00% 1.00% 1.00% 1.00% 1.00% 1.00% 1.00%                
Principal Amount [4],[17] $ 59.6                            
Amortized Cost [4] 59.6                            
Fair Value [3],[4] $ 59.2                            
Investment, Identifier [Axis]: Motion Recruitment Partners LLC, Senior Secured Loans—First Lien, Commercial & Professional Services - 2                              
Variable Rate [10],[32],[38],[39],[43]               6.50% 6.50% 6.50% 6.50% 6.50% 6.50% 6.50%  
Floor Rate [10],[32],[38],[39],[43]               1.00% 1.00% 1.00% 1.00% 1.00% 1.00% 1.00%  
Principal Amount [6],[10],[32],[38],[39],[43]               $ 119.9              
Amortized Cost [10],[32],[38],[39],[43]               115.5              
Fair Value [2],[10],[32],[38],[39],[43]               $ 118.4              
Investment, Identifier [Axis]: Motion Recruitment Partners LLC, Senior Secured Loans—First Lien, Commercial & Professional Services -1                              
Variable Rate [32]               6.50% 6.50% 6.50% 6.50% 6.50% 6.50% 6.50%  
Floor Rate [32]               1.00% 1.00% 1.00% 1.00% 1.00% 1.00% 1.00%  
Principal Amount [6],[32]               $ 4.8              
Amortized Cost [32]               4.5              
Fair Value [2],[32]               $ 4.7              
Investment, Identifier [Axis]: Motion Recruitment Partners LLC, Senior Secured Loans—First Lien, Commercial & Professional Services -3                              
Variable Rate [5]               6.50% 6.50% 6.50% 6.50% 6.50% 6.50% 6.50%  
Floor Rate [5]               1.00% 1.00% 1.00% 1.00% 1.00% 1.00% 1.00%  
Principal Amount [5],[6]               $ 59.6              
Amortized Cost [5]               59.6              
Fair Value [2],[5]               58.9              
Investment, Identifier [Axis]: My Community Homes PropCo 2, Private Equity, Real Estate                              
Number of Shares | shares [15],[28],[29],[30] 84,291,667 84,291,667 84,291,667 84,291,667 84,291,667 84,291,667 84,291,667                
Amortized Cost [15],[28],[29],[30] $ 84.3                            
Fair Value [3],[15],[28],[29],[30] 79.0                            
Investment, Identifier [Axis]: My Community Homes SFR PropCo 2, Private Equity                              
Fair Value $ 79.0             $ 33.0             0.0
Investment, Identifier [Axis]: My Community Homes SFR PropCo 2, Private Equity, Real Estate                              
Number of Shares | shares [6],[23],[24],[31],[32]               33,000,000 33,000,000 33,000,000 33,000,000 33,000,000 33,000,000 33,000,000  
Amortized Cost [23],[24],[31],[32]               $ 33.0              
Fair Value [2],[23],[24],[31],[32]               $ 33.0              
Investment, Identifier [Axis]: NBG Home                              
Variable Rate [32]               5.50% 5.50% 5.50% 5.50% 5.50% 5.50% 5.50%  
Floor Rate [32]               1.00% 1.00% 1.00% 1.00% 1.00% 1.00% 1.00%  
Principal Amount [6],[32]               $ 67.7              
Amortized Cost [32]               67.6              
Fair Value [2],[32]               $ 53.3              
Investment, Identifier [Axis]: NBG Home 1                              
PIK Rate [20],[23],[32]               12.75% 12.75% 12.75% 12.75% 12.75% 12.75% 12.75%  
Floor Rate [20],[23],[32]               1.00% 1.00% 1.00% 1.00% 1.00% 1.00% 1.00%  
Principal Amount [6],[20],[23],[32]               $ 31.4              
Amortized Cost [20],[23],[32]               28.2              
Fair Value [2],[20],[23],[32]               $ 8.5              
Investment, Identifier [Axis]: NBG Home 1 | Maximum                              
PIK Rate [20],[23],[32]               12.75% 12.75% 12.75% 12.75% 12.75% 12.75% 12.75%  
Investment, Identifier [Axis]: NBG Home, Common Stock, Consumer Durables & Apparel                              
Number of Shares | shares 1,903 [15],[28] 1,903 [15],[28] 1,903 [15],[28] 1,903 [15],[28] 1,903 [15],[28] 1,903 [15],[28] 1,903 [15],[28] 1,903 [23],[32] 1,903 [23],[32] 1,903 [23],[32] 1,903 [23],[32] 1,903 [23],[32] 1,903 [23],[32] 1,903 [23],[32]  
Amortized Cost $ 2.4 [15],[28]             $ 2.6 [23],[32]              
Fair Value $ 0.0 [1],[15],[28]             $ 0.0 [2],[23],[32]              
Investment, Identifier [Axis]: NBG Home, Consumer Durables & Apparel 1                              
Variable Rate [12],[15],[25],[28] 5.50% 5.50% 5.50% 5.50% 5.50% 5.50% 5.50%                
Floor Rate [15],[25],[28] 1.00% 1.00% 1.00% 1.00% 1.00% 1.00% 1.00%                
Principal Amount [15],[17],[25],[28] $ 75.9                            
Amortized Cost [15],[25],[28] 69.9                            
Fair Value [3],[15],[25],[28] $ 21.2                            
Investment, Identifier [Axis]: NBG Home, Consumer Durables & Apparel 2                              
PIK Rate [12] 12.75% 12.75% 12.75% 12.75% 12.75% 12.75% 12.75%                
Floor Rate [15],[25],[28] 1.00% 1.00% 1.00% 1.00% 1.00% 1.00% 1.00%                
Principal Amount [15],[17],[25],[28] $ 35.8                            
Amortized Cost [15],[25],[28] 28.2                            
Fair Value [3],[15],[25],[28] 0.0                            
Investment, Identifier [Axis]: NCI Inc                              
Variable Rate [32]               7.50% 7.50% 7.50% 7.50% 7.50% 7.50% 7.50%  
PIK Rate [32]               0.00% 0.00% 0.00% 0.00% 0.00% 0.00% 0.00%  
Floor Rate [32]               1.00% 1.00% 1.00% 1.00% 1.00% 1.00% 1.00%  
Principal Amount [6],[32]               $ 78.8              
Amortized Cost [32]               77.7              
Fair Value [2],[32]               $ 72.0              
Investment, Identifier [Axis]: NCI Inc | Maximum                              
PIK Rate [32]               2.50% 2.50% 2.50% 2.50% 2.50% 2.50% 2.50%  
Investment, Identifier [Axis]: NCI Inc 1                              
Fair Value 28.1             $ 0.0              
Investment, Identifier [Axis]: NCI Inc, Class A-1 Common Stock                              
Fair Value [59] $ 0.0             0.0              
Investment, Identifier [Axis]: NCI Inc, Class A-1 Common Stock, Software & Services                              
Number of Shares | shares [15],[28],[30] 42,923 42,923 42,923 42,923 42,923 42,923 42,923                
Amortized Cost [15],[28],[30] $ 0.0                            
Fair Value [1],[15],[28],[30] 0.0                            
Investment, Identifier [Axis]: NCI Inc, Class B-1 Common Stock                              
Fair Value [59] $ 0.0             0.0              
Investment, Identifier [Axis]: NCI Inc, Class B-1 Common Stock, Software & Services                              
Number of Shares | shares [15],[28],[30] 30,121 30,121 30,121 30,121 30,121 30,121 30,121                
Amortized Cost [15],[28],[30] $ 0.0                            
Fair Value [1],[15],[28],[30] 0.0                            
Investment, Identifier [Axis]: NCI Inc, Class C Common Stock                              
Fair Value [59] $ 20.2             0.0              
Investment, Identifier [Axis]: NCI Inc, Class C Common Stock, Software & Services                              
Number of Shares | shares [15],[28],[30] 49,406 49,406 49,406 49,406 49,406 49,406 49,406                
Amortized Cost [15],[28],[30] $ 20.2                            
Fair Value [1],[15],[28],[30] 20.2                            
Investment, Identifier [Axis]: NCI Inc, Class I-1 Common Stock                              
Fair Value [59] $ 0.0             $ 0.0              
Investment, Identifier [Axis]: NCI Inc, Class I-1 Common Stock, Software & Services                              
Number of Shares | shares [15],[28],[30] 42,923 42,923 42,923 42,923 42,923 42,923 42,923                
Amortized Cost [15],[28],[30] $ 0.0                            
Fair Value [1],[15],[28],[30] $ 0.0                            
Investment, Identifier [Axis]: NCI Inc, Software & Services                              
Variable Rate [12],[15] 7.50% 7.50% 7.50% 7.50% 7.50% 7.50% 7.50%                
Floor Rate [15],[30] 1.00% 1.00% 1.00% 1.00% 1.00% 1.00% 1.00%                
Principal Amount [15],[17],[30] $ 28.1                            
Amortized Cost [15],[30] 28.7                            
Fair Value [3],[15],[30] $ 28.1                            
Investment, Identifier [Axis]: NCI Inc, Software & Services | Maximum                              
PIK Rate [12],[15] 7.50% 7.50% 7.50% 7.50% 7.50% 7.50% 7.50%                
Investment, Identifier [Axis]: NPD Group Inc/The, Consumer Services 1                              
Variable Rate [12] 5.75% 5.75% 5.75% 5.75% 5.75% 5.75% 5.75%                
Floor Rate [15] 0.80% 0.80% 0.80% 0.80% 0.80% 0.80% 0.80%                
Principal Amount [15],[17] $ 0.1                            
Amortized Cost [15] 0.1                            
Fair Value [3],[15] $ 0.1                            
Investment, Identifier [Axis]: NPD Group Inc/The, Consumer Services 2                              
Variable Rate [12],[15] 3.50% 3.50% 3.50% 3.50% 3.50% 3.50% 3.50%                
PIK Rate [12],[15] 2.80% 2.80% 2.80% 2.80% 2.80% 2.80% 2.80%                
Floor Rate [15] 0.80% 0.80% 0.80% 0.80% 0.80% 0.80% 0.80%                
Principal Amount [15],[17] $ 19.2                            
Amortized Cost [15] 19.2                            
Fair Value [3],[15] $ 19.2                            
Investment, Identifier [Axis]: NPD Group Inc/The, Consumer Services 2 | Maximum                              
PIK Rate [12],[15] 2.80% 2.80% 2.80% 2.80% 2.80% 2.80% 2.80%                
Investment, Identifier [Axis]: NPD Group Inc/The, Consumer Services 3                              
Variable Rate [4],[12] 5.75% 5.75% 5.75% 5.75% 5.75% 5.75% 5.75%                
Floor Rate [4] 0.80% 0.80% 0.80% 0.80% 0.80% 0.80% 0.80%                
Principal Amount [4],[17] $ 0.9                            
Amortized Cost [4] 0.9                            
Fair Value [3],[4] $ 0.9                            
Investment, Identifier [Axis]: Net Documents, Senior Secured Loans—First Lien, Software & Services -1                              
Variable Rate [32]               6.50% 6.50% 6.50% 6.50% 6.50% 6.50% 6.50%  
Floor Rate [32]               1.00% 1.00% 1.00% 1.00% 1.00% 1.00% 1.00%  
Principal Amount [6],[32]               $ 24.6              
Amortized Cost [32]               24.4              
Fair Value [2],[32]               $ 24.3              
Investment, Identifier [Axis]: Net Documents, Senior Secured Loans—First Lien, Software & Services -2                              
Variable Rate [32]               6.75% 6.75% 6.75% 6.75% 6.75% 6.75% 6.75%  
Floor Rate [32]               1.00% 1.00% 1.00% 1.00% 1.00% 1.00% 1.00%  
Principal Amount [6],[32]               $ 0.9              
Amortized Cost [32]               0.9              
Fair Value [2],[32]               $ 0.9              
Investment, Identifier [Axis]: Net Documents, Senior Secured Loans—First Lien, Software & Services -3                              
Variable Rate [5]               6.75% 6.75% 6.75% 6.75% 6.75% 6.75% 6.75%  
Floor Rate [5]               1.00% 1.00% 1.00% 1.00% 1.00% 1.00% 1.00%  
Principal Amount [5],[6]               $ 2.1              
Amortized Cost [5]               2.1              
Fair Value [2],[5]               $ 2.0              
Investment, Identifier [Axis]: Net Documents, Senior Secured Loans—First Lien, Software & Services -4                              
Variable Rate [5]               6.75% 6.75% 6.75% 6.75% 6.75% 6.75% 6.75%  
Floor Rate [5]               1.00% 1.00% 1.00% 1.00% 1.00% 1.00% 1.00%  
Principal Amount [5],[6]               $ 7.4              
Amortized Cost [5]               7.3              
Fair Value [2],[5]               $ 7.3              
Investment, Identifier [Axis]: Net Documents, Software & Services 1                              
Variable Rate [12],[15] 6.25% 6.25% 6.25% 6.25% 6.25% 6.25% 6.25%                
Floor Rate [15] 1.00% 1.00% 1.00% 1.00% 1.00% 1.00% 1.00%                
Principal Amount [15],[17] $ 33.0                            
Amortized Cost [15] 32.8                            
Fair Value [3],[15] $ 32.0                            
Investment, Identifier [Axis]: Net Documents, Software & Services 2                              
Variable Rate [4],[12] 6.25% 6.25% 6.25% 6.25% 6.25% 6.25% 6.25%                
Floor Rate [4] 1.00% 1.00% 1.00% 1.00% 1.00% 1.00% 1.00%                
Principal Amount [4],[17] $ 3.0                            
Amortized Cost [4] 2.9                            
Fair Value [3],[4] $ 2.9                            
Investment, Identifier [Axis]: New Era Technology Inc, Senior Secured Loans—First Lien, Software & Services - 3                              
Variable Rate [5]               6.25% 6.25% 6.25% 6.25% 6.25% 6.25% 6.25%  
Floor Rate [5]               1.00% 1.00% 1.00% 1.00% 1.00% 1.00% 1.00%  
Principal Amount [5],[6]               $ 13.8              
Amortized Cost [5]               13.8              
Fair Value [2],[5]               $ 13.7              
Investment, Identifier [Axis]: New Era Technology Inc, Senior Secured Loans—First Lien, Software & Services - 4                              
Variable Rate [5]               6.25% 6.25% 6.25% 6.25% 6.25% 6.25% 6.25%  
Floor Rate [5]               1.00% 1.00% 1.00% 1.00% 1.00% 1.00% 1.00%  
Principal Amount [5],[6]               $ 3.1              
Amortized Cost [5]               3.1              
Fair Value [2],[5]               $ 3.1              
Investment, Identifier [Axis]: New Era Technology Inc, Senior Secured Loans—First Lien, Software & Services -1                              
Variable Rate [9],[10],[32],[38],[39]               6.25% 6.25% 6.25% 6.25% 6.25% 6.25% 6.25%  
Floor Rate [9],[10],[32],[38],[39]               1.00% 1.00% 1.00% 1.00% 1.00% 1.00% 1.00%  
Principal Amount [6],[9],[10],[32],[38],[39]               $ 82.5              
Amortized Cost [9],[10],[32],[38],[39]               78.6              
Fair Value [2],[9],[10],[32],[38],[39]               $ 82.1              
Investment, Identifier [Axis]: New Era Technology Inc, Senior Secured Loans—First Lien, Software & Services -2                              
Variable Rate [32]               6.25% 6.25% 6.25% 6.25% 6.25% 6.25% 6.25%  
Floor Rate [32]               1.00% 1.00% 1.00% 1.00% 1.00% 1.00% 1.00%  
Principal Amount [6],[32]               $ 1.6              
Amortized Cost [32]               1.5              
Fair Value [2],[32]               $ 1.6              
Investment, Identifier [Axis]: New Era Technology Inc, Software & Services 1                              
Variable Rate [12],[14],[15],[16],[19],[40] 6.25% 6.25% 6.25% 6.25% 6.25% 6.25% 6.25%                
Floor Rate [14],[16],[19],[40] 1.00% 1.00% 1.00% 1.00% 1.00% 1.00% 1.00%                
Principal Amount [14],[16],[17],[19],[40] $ 51.1                            
Amortized Cost [14],[16],[19],[40] 49.4                            
Fair Value [3],[14],[16],[19],[40] $ 50.2                            
Investment, Identifier [Axis]: New Era Technology Inc, Software & Services 2                              
Variable Rate [12],[15] 6.25% 6.25% 6.25% 6.25% 6.25% 6.25% 6.25%                
Floor Rate [15] 1.00% 1.00% 1.00% 1.00% 1.00% 1.00% 1.00%                
Principal Amount [15],[17] $ 2.6                            
Amortized Cost [15] 2.5                            
Fair Value [3],[15] $ 2.5                            
Investment, Identifier [Axis]: New Era Technology Inc, Software & Services 3                              
Variable Rate [4],[12] 6.25% 6.25% 6.25% 6.25% 6.25% 6.25% 6.25%                
Floor Rate [4] 1.00% 1.00% 1.00% 1.00% 1.00% 1.00% 1.00%                
Principal Amount [4],[17] $ 2.1                            
Amortized Cost [4] 2.1                            
Fair Value [3],[4] $ 2.1                            
Investment, Identifier [Axis]: NewStar Clarendon 2014-1A Class D 1                              
Variable Rate               18.30% 18.30% 18.30% 18.30% 18.30% 18.30% 18.30%  
Investment, Identifier [Axis]: NewStar Clarendon 2014-1A Class D, Diversified Financials                              
Rate 19.30% [12],[15],[29] 19.30% [12],[15],[29] 19.30% [12],[15],[29] 19.30% [12],[15],[29] 19.30% [12],[15],[29] 19.30% [12],[15],[29] 19.30% [12],[15],[29] 19.50% [7],[24],[32] 19.50% [7],[24],[32] 19.50% [7],[24],[32] 19.50% [7],[24],[32] 19.50% [7],[24],[32] 19.50% [7],[24],[32] 19.50% [7],[24],[32]  
Principal Amount $ 8.3 [15],[17],[29]             $ 8.3 [6],[24],[32]              
Amortized Cost 2.5 [15],[29]             2.5 [24],[32]              
Fair Value $ 3.5 [3],[15],[29]             $ 4.2 [2],[24],[32]              
Investment, Identifier [Axis]: Nine West Holdings Inc, Common Stock, Consumer Durables & Apparel                              
Number of Shares | shares 5,451 [15],[28] 5,451 [15],[28] 5,451 [15],[28] 5,451 [15],[28] 5,451 [15],[28] 5,451 [15],[28] 5,451 [15],[28] 5,451 [23],[32] 5,451 [23],[32] 5,451 [23],[32] 5,451 [23],[32] 5,451 [23],[32] 5,451 [23],[32] 5,451 [23],[32]  
Amortized Cost $ 6.4 [15],[28]             $ 6.5 [23],[32]              
Fair Value $ 0.0 [1],[15],[28]             $ 0.0 [2],[23],[32]              
Investment, Identifier [Axis]: Novotech Pty Ltd, Health Care Equipment & Services                              
Variable Rate [4],[12],[29] 5.25% 5.25% 5.25% 5.25% 5.25% 5.25% 5.25%                
Floor Rate [4],[29] 0.50% 0.50% 0.50% 0.50% 0.50% 0.50% 0.50%                
Principal Amount [4],[17],[29] $ 5.7                            
Amortized Cost [4],[29] 5.6                            
Fair Value [3],[4],[29] $ 5.5                            
Investment, Identifier [Axis]: OEConnection LLC, Senior Secured Loans—Second Lien, Software & Services - 2                              
Variable Rate [32]               7.00% 7.00% 7.00% 7.00% 7.00% 7.00% 7.00%  
Floor Rate [32]               0.50% 0.50% 0.50% 0.50% 0.50% 0.50% 0.50%  
Principal Amount [6],[32]               $ 49.0              
Amortized Cost [32]               49.0              
Fair Value [2],[32]               $ 48.1              
Investment, Identifier [Axis]: OEConnection LLC, Senior Secured Loans—Second Lien, Software & Services -1                              
Variable Rate [32],[43]               8.25% 8.25% 8.25% 8.25% 8.25% 8.25% 8.25%  
Floor Rate [32],[43]               0.00% 0.00% 0.00% 0.00% 0.00% 0.00% 0.00%  
Principal Amount [6],[32],[43]               $ 27.0              
Amortized Cost [32],[43]               26.6              
Fair Value [2],[32],[43]               $ 26.5              
Investment, Identifier [Axis]: OEConnection LLC, Software & Services                              
Variable Rate [12] 7.00% 7.00% 7.00% 7.00% 7.00% 7.00% 7.00%                
Floor Rate [15],[18] 0.50% 0.50% 0.50% 0.50% 0.50% 0.50% 0.50%                
Principal Amount [15],[17],[18] $ 76.1                            
Amortized Cost [15],[18] 75.7                            
Fair Value [3],[15],[18] $ 73.6                            
Investment, Identifier [Axis]: Omnimax International Inc                              
Variable Rate [8],[9],[10],[32],[39],[43]               7.25% 7.25% 7.25% 7.25% 7.25% 7.25% 7.25%  
Floor Rate [8],[9],[10],[32],[39],[43]               1.00% 1.00% 1.00% 1.00% 1.00% 1.00% 1.00%  
Principal Amount [6],[8],[9],[10],[32],[39],[43]               $ 218.5              
Amortized Cost [8],[9],[10],[32],[39],[43]               209.2              
Fair Value [2],[8],[9],[10],[32],[39],[43]               217.0              
Investment, Identifier [Axis]: Omnimax International Inc, Capital Goods                              
Variable Rate [12],[13],[14],[15],[16],[18],[40] 8.50% 8.50% 8.50% 8.50% 8.50% 8.50% 8.50%                
Floor Rate [13],[14],[15],[16],[18],[40] 1.00% 1.00% 1.00% 1.00% 1.00% 1.00% 1.00%                
Principal Amount [13],[14],[15],[16],[17],[18],[40] $ 183.6                            
Amortized Cost [13],[14],[15],[16],[18],[40] 176.6                            
Fair Value [3],[13],[14],[15],[16],[18],[40] 175.0                            
Investment, Identifier [Axis]: One Call Care Management Inc                              
Fair Value [58]               $ 0.0             4.7
Investment, Identifier [Axis]: One Call Care Management Inc 1                              
Variable Rate [32],[36]               5.50% 5.50% 5.50% 5.50% 5.50% 5.50% 5.50%  
Floor Rate [31],[32],[36]               0.80% 0.80% 0.80% 0.80% 0.80% 0.80% 0.80%  
Principal Amount [6],[31],[32],[36]               $ 5.0              
Amortized Cost [31],[32],[36]               4.7              
Fair Value 0.0 [60]             $ 5.0 [2],[31],[32],[36],[60]             0.0
Investment, Identifier [Axis]: One Call Care Management Inc 2                              
PIK Rate [30],[32]               8.50% 8.50% 8.50% 8.50% 8.50% 8.50% 8.50%  
Principal Amount [6],[31],[32]               $ 23.5              
Amortized Cost [31],[32]               21.6              
Fair Value 0.0 [60]             $ 23.5 [2],[31],[32],[57],[60]             0.0 [57]
Investment, Identifier [Axis]: One Call Care Management Inc 2 | Maximum                              
PIK Rate [30],[32]               8.50% 8.50% 8.50% 8.50% 8.50% 8.50% 8.50%  
Investment, Identifier [Axis]: One Call Care Management Inc, Common Stock                              
Fair Value [58]               $ 0.0             2.4
Investment, Identifier [Axis]: One Call Care Management Inc, Common Stock 1                              
Fair Value $ 0.0 [60]             $ 2.4 [57],[60]             0.0 [57]
Investment, Identifier [Axis]: One Call Care Management Inc, Common Stock, Health Care Equipment & Services                              
Number of Shares | shares 34,872 [15],[28] 34,872 [15],[28] 34,872 [15],[28] 34,872 [15],[28] 34,872 [15],[28] 34,872 [15],[28] 34,872 [15],[28] 34,872 [23],[31],[32] 34,872 [23],[31],[32] 34,872 [23],[31],[32] 34,872 [23],[31],[32] 34,872 [23],[31],[32] 34,872 [23],[31],[32] 34,872 [23],[31],[32]  
Amortized Cost $ 2.1 [15],[28]             $ 2.1 [23],[31],[32]              
Fair Value $ 1.9 [1],[15],[28]             2.4 [2],[23],[31],[32]              
Investment, Identifier [Axis]: One Call Care Management Inc, Health Care Equipment & Services 1                              
Variable Rate [12],[15],[30],[37] 5.50% 5.50% 5.50% 5.50% 5.50% 5.50% 5.50%                
Floor Rate [15],[37] 0.80% 0.80% 0.80% 0.80% 0.80% 0.80% 0.80%                
Principal Amount [15],[17],[37] $ 4.9                            
Amortized Cost [15],[37] 4.7                            
Fair Value [3],[15],[37] $ 4.1                            
Investment, Identifier [Axis]: One Call Care Management Inc, Health Care Equipment & Services 2                              
PIK Rate [12] 8.50% 8.50% 8.50% 8.50% 8.50% 8.50% 8.50%                
Principal Amount [15],[17] $ 25.6                            
Amortized Cost [15] 23.9                            
Fair Value [3],[15] $ 20.9                            
Investment, Identifier [Axis]: One Call Care Management Inc, Health Care Equipment & Services 2 | Maximum                              
PIK Rate [12] 8.50% 8.50% 8.50% 8.50% 8.50% 8.50% 8.50%                
Investment, Identifier [Axis]: One Call Care Management Inc, Preferred Stock A                              
Fair Value $ 0.0 [60]             26.1 [57],[60]             0.0 [57]
Investment, Identifier [Axis]: One Call Care Management Inc, Preferred Stock A 2                              
Fair Value [58]               $ 0.0             25.5
Investment, Identifier [Axis]: One Call Care Management Inc, Preferred Stock A, Health Care Equipment & Services                              
Number of Shares | shares 371,992 [15],[28] 371,992 [15],[28] 371,992 [15],[28] 371,992 [15],[28] 371,992 [15],[28] 371,992 [15],[28] 371,992 [15],[28] 371,992 [23],[31],[32] 371,992 [23],[31],[32] 371,992 [23],[31],[32] 371,992 [23],[31],[32] 371,992 [23],[31],[32] 371,992 [23],[31],[32] 371,992 [23],[31],[32]  
Amortized Cost $ 22.8 [15],[28]             $ 22.8 [23],[31],[32]              
Fair Value $ 20.5 [1],[15],[28]             26.1 [2],[23],[31],[32]              
Investment, Identifier [Axis]: One Call Care Management Inc, Preferred Stock B                              
Variable Rate 9.00% 9.00% 9.00% 9.00% 9.00% 9.00% 9.00%                
Fair Value $ 0.0 [60]             $ 9.2 [57],[60]             0.0 [57]
Investment, Identifier [Axis]: One Call Care Management Inc, Preferred Stock B | Maximum                              
Variable Rate 9.00% 9.00% 9.00% 9.00% 9.00% 9.00% 9.00%                
Investment, Identifier [Axis]: One Call Care Management Inc, Preferred Stock B 2                              
PIK Rate               9.00% 9.00% 9.00% 9.00% 9.00% 9.00% 9.00%  
Fair Value [58]               $ 0.0             10.6
Investment, Identifier [Axis]: One Call Care Management Inc, Preferred Stock B 2 | Maximum                              
PIK Rate               9.00% 9.00% 9.00% 9.00% 9.00% 9.00% 9.00%  
Investment, Identifier [Axis]: One Call Care Management Inc, Preferred Stock B, Health Care Equipment & Services                              
PIK Rate 9.00% [12],[15] 9.00% [12],[15] 9.00% [12],[15] 9.00% [12],[15] 9.00% [12],[15] 9.00% [12],[15] 9.00% [12],[15] 9.00% [7],[31],[32] 9.00% [7],[31],[32] 9.00% [7],[31],[32] 9.00% [7],[31],[32] 9.00% [7],[31],[32] 9.00% [7],[31],[32] 9.00% [7],[31],[32]  
Number of Shares | shares 7,672,347 [15] 7,672,347 [15] 7,672,347 [15] 7,672,347 [15] 7,672,347 [15] 7,672,347 [15] 7,672,347 [15] 7,672,347 [31],[32] 7,672,347 [31],[32] 7,672,347 [31],[32] 7,672,347 [31],[32] 7,672,347 [31],[32] 7,672,347 [31],[32] 7,672,347 [31],[32]  
Amortized Cost $ 8.0 [15]             $ 8.0 [31],[32]              
Fair Value $ 7.7 [1],[15]             $ 9.2 [2],[31],[32]              
Investment, Identifier [Axis]: One Call Care Management Inc, Preferred Stock B, Health Care Equipment & Services | Maximum                              
PIK Rate 9.00% [12],[15] 9.00% [12],[15] 9.00% [12],[15] 9.00% [12],[15] 9.00% [12],[15] 9.00% [12],[15] 9.00% [12],[15] 9.00% [7],[31],[32] 9.00% [7],[31],[32] 9.00% [7],[31],[32] 9.00% [7],[31],[32] 9.00% [7],[31],[32] 9.00% [7],[31],[32] 9.00% [7],[31],[32]  
Investment, Identifier [Axis]: Opendoor Labs Inc, Structured Mezzanine, Real Estate                              
Rate [12],[15],[29] 10.00% 10.00% 10.00% 10.00% 10.00% 10.00% 10.00%                
Principal Amount [15],[17],[29] $ 71.1                            
Amortized Cost [15],[29] 71.1                            
Fair Value [3],[15],[29] 66.4                            
Investment, Identifier [Axis]: Opendoor Labs Inc, Structured Mezzanine, Real Estate 1                              
Rate [7],[24],[32]               10.00% 10.00% 10.00% 10.00% 10.00% 10.00% 10.00%  
Principal Amount [6],[24],[32]               $ 71.1              
Amortized Cost [24],[32]               71.1              
Fair Value [2],[24],[32]               $ 71.1              
Investment, Identifier [Axis]: Opendoor Labs Inc, Structured Mezzanine, Real Estate 2                              
Rate [5],[7],[24]               10.00% 10.00% 10.00% 10.00% 10.00% 10.00% 10.00%  
Principal Amount [5],[6],[24]               $ 88.9              
Amortized Cost [5],[24]               88.9              
Fair Value [2],[5],[24]               88.9              
Investment, Identifier [Axis]: Orchard Marine Limited, Class B Common Stock                              
Fair Value 0.0             $ 0.0             0.0
Investment, Identifier [Axis]: Orchard Marine Limited, Class B Common Stock, Transportation                              
Number of Shares | shares [6],[23],[24],[32],[42]               1,964 1,964 1,964 1,964 1,964 1,964 1,964  
Amortized Cost [23],[24],[32],[42]               $ 3.1              
Fair Value [2],[23],[24],[32],[42]               0.0              
Investment, Identifier [Axis]: Orchard Marine Limited, Series A Preferred Stock                              
Fair Value $ 0.0             $ 64.6             24.6
Investment, Identifier [Axis]: Orchard Marine Limited, Series A Preferred Stock, Transportation                              
Number of Shares | shares [6],[23],[24],[32],[42]               62,976 62,976 62,976 62,976 62,976 62,976 62,976  
Amortized Cost [23],[24],[32],[42]               $ 62.0              
Fair Value [2],[23],[24],[32],[42]               $ 64.6              
Investment, Identifier [Axis]: Oxford Global Resources LLC, Commercial & Professional Services 1                              
Variable Rate [12],[13],[14],[18],[19],[40] 6.00% 6.00% 6.00% 6.00% 6.00% 6.00% 6.00%                
Floor Rate [13],[14],[15],[18],[19],[40] 1.00% 1.00% 1.00% 1.00% 1.00% 1.00% 1.00%                
Principal Amount [13],[14],[15],[17],[18],[19],[40] $ 94.5                            
Amortized Cost [13],[14],[15],[18],[19],[40] 93.7                            
Fair Value [3],[13],[14],[15],[18],[19],[40] $ 94.1                            
Investment, Identifier [Axis]: Oxford Global Resources LLC, Commercial & Professional Services 2                              
Variable Rate [12],[15] 6.00% 6.00% 6.00% 6.00% 6.00% 6.00% 6.00%                
Floor Rate [15] 1.00% 1.00% 1.00% 1.00% 1.00% 1.00% 1.00%                
Principal Amount [15],[17] $ 3.5                            
Amortized Cost [15] 3.5                            
Fair Value [3],[15] $ 3.5                            
Investment, Identifier [Axis]: Oxford Global Resources LLC, Commercial & Professional Services 3                              
Variable Rate [4],[12] 6.00% 6.00% 6.00% 6.00% 6.00% 6.00% 6.00%                
Floor Rate [4] 1.00% 1.00% 1.00% 1.00% 1.00% 1.00% 1.00%                
Principal Amount [4],[17] $ 8.3                            
Amortized Cost [4] 8.3                            
Fair Value [3],[4] $ 8.3                            
Investment, Identifier [Axis]: Oxford Global Resources LLC, Commercial & Professional Services 4                              
Variable Rate [4],[12] 6.00% 6.00% 6.00% 6.00% 6.00% 6.00% 6.00%                
Floor Rate [4] 1.00% 1.00% 1.00% 1.00% 1.00% 1.00% 1.00%                
Principal Amount [4],[17] $ 4.1                            
Amortized Cost [4] 4.1                            
Fair Value [3],[4] 4.1                            
Investment, Identifier [Axis]: Oxford Global Resources LLC, Senior Secured Loans—First Lien, Commercial & Professional Services - 3                              
Variable Rate [5]               6.00% 6.00% 6.00% 6.00% 6.00% 6.00% 6.00%  
Floor Rate [5]               1.00% 1.00% 1.00% 1.00% 1.00% 1.00% 1.00%  
Principal Amount [5],[6]               $ 15.3              
Amortized Cost [5]               15.3              
Fair Value [2],[5]               $ 15.3              
Investment, Identifier [Axis]: Oxford Global Resources LLC, Senior Secured Loans—First Lien, Commercial & Professional Services - 4                              
Variable Rate [5]               6.00% 6.00% 6.00% 6.00% 6.00% 6.00% 6.00%  
Floor Rate [5]               1.00% 1.00% 1.00% 1.00% 1.00% 1.00% 1.00%  
Principal Amount [5],[6]               $ 3.7              
Amortized Cost [5]               3.7              
Fair Value [2],[5]               $ 3.7              
Investment, Identifier [Axis]: Oxford Global Resources LLC, Senior Secured Loans—First Lien, Commercial & Professional Services -1                              
Variable Rate [8],[9],[38],[39],[43]               6.00% 6.00% 6.00% 6.00% 6.00% 6.00% 6.00%  
Floor Rate [8],[9],[38],[39],[43]               1.00% 1.00% 1.00% 1.00% 1.00% 1.00% 1.00%  
Principal Amount [6],[8],[9],[38],[39],[43]               $ 88.4              
Amortized Cost [8],[9],[38],[39],[43]               87.6              
Fair Value [2],[8],[9],[38],[39],[43]               $ 88.2              
Investment, Identifier [Axis]: Oxford Global Resources LLC, Senior Secured Loans—First Lien, Commercial & Professional Services -2                              
Variable Rate [32]               6.00% 6.00% 6.00% 6.00% 6.00% 6.00% 6.00%  
Floor Rate [32]               1.00% 1.00% 1.00% 1.00% 1.00% 1.00% 1.00%  
Principal Amount [6],[32]               $ 4.0              
Amortized Cost [32]               4.0              
Fair Value [2],[32]               $ 4.0              
Investment, Identifier [Axis]: P2 Energy Solutions Inc., Senior Secured Loans—First Lien, Software & Services - 1                              
Variable Rate [32]               6.75% 6.75% 6.75% 6.75% 6.75% 6.75% 6.75%  
Floor Rate [32]               1.00% 1.00% 1.00% 1.00% 1.00% 1.00% 1.00%  
Principal Amount [6],[32]               $ 4.6              
Amortized Cost [32]               4.3              
Fair Value [2],[32]               $ 4.2              
Investment, Identifier [Axis]: P2 Energy Solutions Inc., Senior Secured Loans—First Lien, Software & Services - 2                              
Variable Rate [8],[10],[32],[38],[39],[43]               6.75% 6.75% 6.75% 6.75% 6.75% 6.75% 6.75%  
Floor Rate [8],[9],[10],[32],[33],[39],[43]               1.00% 1.00% 1.00% 1.00% 1.00% 1.00% 1.00%  
Principal Amount [6],[8],[9],[10],[32],[33],[39],[43]               $ 249.1              
Amortized Cost [8],[9],[10],[32],[33],[39],[43]               232.7              
Fair Value [2],[8],[9],[10],[32],[33],[39],[43]               $ 232.0              
Investment, Identifier [Axis]: P2 Energy Solutions Inc., Senior Secured Loans—First Lien, Software & Services - 3                              
Variable Rate [5]               6.75% 6.75% 6.75% 6.75% 6.75% 6.75% 6.75%  
Floor Rate [5]               1.00% 1.00% 1.00% 1.00% 1.00% 1.00% 1.00%  
Principal Amount [5],[6]               $ 10.6              
Amortized Cost [5]               10.6              
Fair Value [2],[5]               9.9              
Investment, Identifier [Axis]: PRG III LLC, Preferred Stock, Series A PIK                              
Fair Value $ 105.7             $ 17.4              
Investment, Identifier [Axis]: PRG III LLC, Preferred Stock, Series A PIK, Media & Entertainment                              
Number of Shares | shares 434,250 [15],[28],[30] 434,250 [15],[28],[30] 434,250 [15],[28],[30] 434,250 [15],[28],[30] 434,250 [15],[28],[30] 434,250 [15],[28],[30] 434,250 [15],[28],[30] 434,250 [23],[31],[32] 434,250 [23],[31],[32] 434,250 [23],[31],[32] 434,250 [23],[31],[32] 434,250 [23],[31],[32] 434,250 [23],[31],[32] 434,250 [23],[31],[32]  
Amortized Cost $ 18.1 [15],[28],[30]             $ 18.1 [23],[31],[32]              
Fair Value 105.7 [1],[15],[28],[30]             17.4 [2],[23],[31],[32]              
Investment, Identifier [Axis]: PRG III LLC, Preferred Stock, Series B PIK                              
Fair Value $ 0.0             $ 0.0              
Investment, Identifier [Axis]: PRG III LLC, Preferred Stock, Series B PIK, Media & Entertainment                              
Number of Shares | shares 140 [15],[28],[30] 140 [15],[28],[30] 140 [15],[28],[30] 140 [15],[28],[30] 140 [15],[28],[30] 140 [15],[28],[30] 140 [15],[28],[30] 140 [23],[31],[32] 140 [23],[31],[32] 140 [23],[31],[32] 140 [23],[31],[32] 140 [23],[31],[32] 140 [23],[31],[32] 140 [23],[31],[32]  
Amortized Cost $ 0.0 [15],[28],[30]             $ 0.0 [23],[31],[32]              
Fair Value $ 0.0 [1],[15],[28],[30]             $ 0.0 [2],[23],[31],[32]              
Investment, Identifier [Axis]: PSKW LLC                              
Variable Rate [9],[10],[32],[33],[38]               6.25% 6.25% 6.25% 6.25% 6.25% 6.25% 6.25%  
Floor Rate [9],[10],[32],[33],[38]               1.00% 1.00% 1.00% 1.00% 1.00% 1.00% 1.00%  
Principal Amount [6],[9],[10],[32],[33],[38]               $ 294.7              
Amortized Cost [9],[10],[32],[33],[38]               283.5              
Fair Value [2],[9],[10],[32],[33],[38]               $ 294.7              
Investment, Identifier [Axis]: PSKW LLC (dba ConnectiveRx), Health Care Equipment & Services                              
Variable Rate [12],[14],[15],[16],[19],[34] 6.25% 6.25% 6.25% 6.25% 6.25% 6.25% 6.25%                
Floor Rate [14],[15],[16],[19],[34] 1.00% 1.00% 1.00% 1.00% 1.00% 1.00% 1.00%                
Principal Amount [14],[15],[16],[17],[19],[34] $ 291.8                            
Amortized Cost [14],[15],[16],[19],[34] 282.8                            
Fair Value [3],[14],[15],[16],[19],[34] $ 291.8                            
Investment, Identifier [Axis]: Parata Systems, Senior Secured Loans—First Lien, Health Care Equipment & Services -1                              
Variable Rate [32],[39],[43]               5.75% 5.75% 5.75% 5.75% 5.75% 5.75% 5.75%  
Floor Rate [32],[39],[43]               1.00% 1.00% 1.00% 1.00% 1.00% 1.00% 1.00%  
Principal Amount [6],[32],[39],[43]               $ 73.9              
Amortized Cost [32],[39],[43]               73.4              
Fair Value [2],[32],[39],[43]               $ 74.1              
Investment, Identifier [Axis]: Parata Systems, Senior Secured Loans—First Lien, Health Care Equipment & Services -2                              
Variable Rate [5]               5.75% 5.75% 5.75% 5.75% 5.75% 5.75% 5.75%  
Floor Rate [5]               1.00% 1.00% 1.00% 1.00% 1.00% 1.00% 1.00%  
Principal Amount [5],[6]               $ 22.0              
Amortized Cost [5]               22.0              
Fair Value [2],[5]               $ 22.1              
Investment, Identifier [Axis]: Parata Systems, Senior Secured Loans—First Lien, Health Care Equipment & Services -3                              
Variable Rate [5]               5.75% 5.75% 5.75% 5.75% 5.75% 5.75% 5.75%  
Floor Rate [5]               1.00% 1.00% 1.00% 1.00% 1.00% 1.00% 1.00%  
Principal Amount [5],[6]               $ 5.5              
Amortized Cost [5]               5.5              
Fair Value [2],[5]               $ 5.5              
Investment, Identifier [Axis]: Parts Town LLC, Retailing 1                              
Variable Rate [4],[12] 5.50% 5.50% 5.50% 5.50% 5.50% 5.50% 5.50%                
Floor Rate [15],[19] 0.80% 0.80% 0.80% 0.80% 0.80% 0.80% 0.80%                
Principal Amount [15],[17],[19] $ 37.1                            
Amortized Cost [15],[19] 36.8                            
Fair Value [3],[15],[19] $ 35.9                            
Investment, Identifier [Axis]: Parts Town LLC, Retailing 2                              
Variable Rate [12],[15] 5.50% 5.50% 5.50% 5.50% 5.50% 5.50% 5.50%                
Floor Rate [15] 0.80% 0.80% 0.80% 0.80% 0.80% 0.80% 0.80%                
Principal Amount [15],[17] $ 63.2                            
Amortized Cost [15] 62.7                            
Fair Value [3],[15] $ 61.1                            
Investment, Identifier [Axis]: Parts Town LLC, Senior Secured Loans—First Lien, Retailing - 1                              
Variable Rate [32]               5.50% 5.50% 5.50% 5.50% 5.50% 5.50% 5.50%  
Floor Rate [32]               0.80% 0.80% 0.80% 0.80% 0.80% 0.80% 0.80%  
Principal Amount [6],[32]               $ 87.4              
Amortized Cost [32]               86.6              
Fair Value [2],[32]               $ 86.6              
Investment, Identifier [Axis]: Parts Town LLC, Senior Secured Loans—First Lien, Retailing - 2                              
Variable Rate [5]               5.50% 5.50% 5.50% 5.50% 5.50% 5.50% 5.50%  
Floor Rate [5]               0.80% 0.80% 0.80% 0.80% 0.80% 0.80% 0.80%  
Principal Amount [5],[6]               $ 63.9              
Amortized Cost [5]               63.9              
Fair Value [2],[5]               $ 63.3              
Investment, Identifier [Axis]: PartsSource Inc, Health Care Equipment & Services 1                              
Variable Rate [12],[15] 5.75% 5.75% 5.75% 5.75% 5.75% 5.75% 5.75%                
Floor Rate [15] 0.80% 0.80% 0.80% 0.80% 0.80% 0.80% 0.80%                
Principal Amount [15],[17] $ 65.1                            
Amortized Cost [15] 64.5                            
Fair Value [3],[15] $ 62.9                            
Investment, Identifier [Axis]: PartsSource Inc, Health Care Equipment & Services 2                              
Variable Rate [4],[12] 5.75% 5.75% 5.75% 5.75% 5.75% 5.75% 5.75%                
Floor Rate [4] 0.80% 0.80% 0.80% 0.80% 0.80% 0.80% 0.80%                
Principal Amount [4],[17] $ 4.3                            
Amortized Cost [4] 4.3                            
Fair Value [3],[4] $ 4.1                            
Investment, Identifier [Axis]: PartsSource Inc, Health Care Equipment & Services 3                              
Variable Rate [4],[12] 5.75% 5.75% 5.75% 5.75% 5.75% 5.75% 5.75%                
Floor Rate [4] 0.80% 0.80% 0.80% 0.80% 0.80% 0.80% 0.80%                
Principal Amount [4],[17] $ 22.9                            
Amortized Cost [4] 22.7                            
Fair Value [3],[4] $ 22.1                            
Investment, Identifier [Axis]: PartsSource Inc, Senior Secured Loans—First Lien, Health Care Equipment & Services -1                              
Variable Rate [32]               5.75% 5.75% 5.75% 5.75% 5.75% 5.75% 5.75%  
Floor Rate [32]               0.80% 0.80% 0.80% 0.80% 0.80% 0.80% 0.80%  
Principal Amount [6],[32]               $ 65.8              
Amortized Cost [32]               65.0              
Fair Value [2],[32]               $ 64.7              
Investment, Identifier [Axis]: PartsSource Inc, Senior Secured Loans—First Lien, Health Care Equipment & Services -2                              
Variable Rate [5]               5.75% 5.75% 5.75% 5.75% 5.75% 5.75% 5.75%  
Floor Rate [5]               0.80% 0.80% 0.80% 0.80% 0.80% 0.80% 0.80%  
Principal Amount [5],[6]               $ 4.3              
Amortized Cost [5]               4.2              
Fair Value [2],[5]               $ 4.2              
Investment, Identifier [Axis]: PartsSource Inc, Senior Secured Loans—First Lien, Health Care Equipment & Services -3                              
Variable Rate [5]               5.75% 5.75% 5.75% 5.75% 5.75% 5.75% 5.75%  
Floor Rate [5]               0.80% 0.80% 0.80% 0.80% 0.80% 0.80% 0.80%  
Principal Amount [5],[6]               $ 22.9              
Amortized Cost [5]               22.6              
Fair Value [2],[5]               $ 22.5              
Investment, Identifier [Axis]: Peraton Corp                              
Variable Rate [32],[36]               3.75% 3.75% 3.75% 3.75% 3.75% 3.75% 3.75%  
Floor Rate [32],[36]               0.80% 0.80% 0.80% 0.80% 0.80% 0.80% 0.80%  
Principal Amount [6],[32],[36]               $ 9.0              
Amortized Cost [32],[36]               8.7              
Fair Value [2],[32],[36]               $ 9.0              
Investment, Identifier [Axis]: Peraton Corp, Capital Goods 1                              
Variable Rate [12] 8.00% 8.00% 8.00% 8.00% 8.00% 8.00% 8.00%                
Floor Rate [15],[34] 1.00% 1.00% 1.00% 1.00% 1.00% 1.00% 1.00%                
Principal Amount [15],[17],[34] $ 175.0                            
Amortized Cost [15],[34] 166.2                            
Fair Value [3],[15],[34] $ 174.7                            
Investment, Identifier [Axis]: Peraton Corp, Capital Goods 2                              
Variable Rate [12] 7.75% 7.75% 7.75% 7.75% 7.75% 7.75% 7.75%                
Floor Rate [15] 0.80% 0.80% 0.80% 0.80% 0.80% 0.80% 0.80%                
Principal Amount [15],[17] $ 130.4                            
Amortized Cost [15] 124.8                            
Fair Value [3],[15] $ 128.8                            
Investment, Identifier [Axis]: Peraton Corp, Senior Secured Loans—Second Lien, Capital Goods - 1                              
Variable Rate [32],[33]               8.00% 8.00% 8.00% 8.00% 8.00% 8.00% 8.00%  
Floor Rate [32],[33]               1.00% 1.00% 1.00% 1.00% 1.00% 1.00% 1.00%  
Principal Amount [6],[32],[33]               $ 175.0              
Amortized Cost [32],[33]               165.3              
Fair Value [2],[32],[33]               $ 178.5              
Investment, Identifier [Axis]: Peraton Corp, Senior Secured Loans—Second Lien, Capital Goods - 2                              
Variable Rate [32]               7.75% 7.75% 7.75% 7.75% 7.75% 7.75% 7.75%  
Floor Rate [32]               0.80% 0.80% 0.80% 0.80% 0.80% 0.80% 0.80%  
Principal Amount [6],[32]               $ 156.4              
Amortized Cost [32]               149.9              
Fair Value [2],[32]               $ 158.7              
Investment, Identifier [Axis]: Performance Health Holdings Inc                              
Variable Rate [10],[32],[43]               6.00% 6.00% 6.00% 6.00% 6.00% 6.00% 6.00%  
Floor Rate [10],[32],[43]               1.00% 1.00% 1.00% 1.00% 1.00% 1.00% 1.00%  
Principal Amount [6],[10],[32],[43]               $ 120.7              
Amortized Cost [10],[32],[43]               119.5              
Fair Value [2],[10],[32],[43]               $ 120.2              
Investment, Identifier [Axis]: Performance Health Holdings Inc, Health Care Equipment & Services                              
Variable Rate [12],[15],[16],[18],[40] 6.00% 6.00% 6.00% 6.00% 6.00% 6.00% 6.00%                
Floor Rate [15],[16],[18],[40] 1.00% 1.00% 1.00% 1.00% 1.00% 1.00% 1.00%                
Principal Amount [15],[16],[17],[18],[40] $ 108.3                            
Amortized Cost [15],[16],[18],[40] 107.4                            
Fair Value [3],[15],[16],[18],[40] 105.4                            
Investment, Identifier [Axis]: Petrochoice Holdings Inc                              
Variable Rate [32]               8.75% 8.75% 8.75% 8.75% 8.75% 8.75% 8.75%  
Floor Rate [32]               1.00% 1.00% 1.00% 1.00% 1.00% 1.00% 1.00%  
Principal Amount [6],[32]               $ 65.0              
Amortized Cost [32]               64.4              
Fair Value [2],[32]               $ 57.6              
Investment, Identifier [Axis]: Petroplex Acidizing Inc                              
Variable Rate [20],[23],[32],[42]               8.25% 8.25% 8.25% 8.25% 8.25% 8.25% 8.25%  
PIK Rate [20],[23],[32],[42]               1.80% 1.80% 1.80% 1.80% 1.80% 1.80% 1.80%  
Floor Rate [20],[23],[32],[42]               1.00% 1.00% 1.00% 1.00% 1.00% 1.00% 1.00%  
Principal Amount [6],[20],[23],[32],[42]               $ 27.0              
Amortized Cost [20],[23],[32],[42]               22.0              
Fair Value 0.0             $ 9.7 [2],[20],[23],[32],[42]             4.5
Investment, Identifier [Axis]: Petroplex Acidizing Inc | Maximum                              
PIK Rate [20],[23],[32],[42]               1.80% 1.80% 1.80% 1.80% 1.80% 1.80% 1.80%  
Investment, Identifier [Axis]: Petroplex Acidizing Inc, Preferred Stock A                              
Fair Value $ 0.0             $ 0.0             0.0
Investment, Identifier [Axis]: Petroplex Acidizing Inc, Preferred Stock A, Energy                              
Number of Shares | shares [23],[32],[42]               25,138,631 25,138,631 25,138,631 25,138,631 25,138,631 25,138,631 25,138,631  
Amortized Cost [23],[32],[42]               $ 4.9              
Fair Value [2],[23],[32],[42]               0.0              
Investment, Identifier [Axis]: Petroplex Acidizing Inc, Trade Claim, Energy                              
Number of Shares | shares [15],[28] 646,309 646,309 646,309 646,309 646,309 646,309 646,309                
Amortized Cost [15],[28] $ 0.6                            
Fair Value [1],[15],[28] 0.6                            
Investment, Identifier [Axis]: Petroplex Acidizing Inc, Warrant                              
Fair Value $ 0.0             $ 0.0             0.0
Investment, Identifier [Axis]: Petroplex Acidizing Inc, Warrant, Energy                              
Number of Shares | shares [23],[32],[42]               8 8 8 8 8 8 8  
Amortized Cost [23],[32],[42]               $ 0.0              
Fair Value [2],[23],[32],[42]               $ 0.0              
Investment, Identifier [Axis]: Polyconcept North America Inc                              
Variable Rate [32],[36]               4.50% 4.50% 4.50% 4.50% 4.50% 4.50% 4.50%  
Floor Rate [32],[36]               1.00% 1.00% 1.00% 1.00% 1.00% 1.00% 1.00%  
Principal Amount [6],[32],[36]               $ 22.8              
Amortized Cost [32],[36]               22.6              
Fair Value [2],[32],[36]               $ 22.7              
Investment, Identifier [Axis]: Polyconcept North America Inc | Maximum                              
Variable Rate [32],[36]               4.50% 4.50% 4.50% 4.50% 4.50% 4.50% 4.50%  
Investment, Identifier [Axis]: Polyconcept North America Inc 2/16/24                              
PIK Rate [32]               11.00% 11.00% 11.00% 11.00% 11.00% 11.00% 11.00%  
Principal Amount [6],[32]               $ 10.0              
Amortized Cost [32]               9.9              
Fair Value [2],[32]               $ 10.0              
Investment, Identifier [Axis]: Polyconcept North America Inc 2/16/24 | Maximum                              
PIK Rate [32]               11.00% 11.00% 11.00% 11.00% 11.00% 11.00% 11.00%  
Investment, Identifier [Axis]: Polyconcept North America Inc, Class A - 1 Units, Household & Personal Products                              
Number of Shares | shares 30,000 [15] 30,000 [15] 30,000 [15] 30,000 [15] 30,000 [15] 30,000 [15] 30,000 [15] 30,000 [23],[32] 30,000 [23],[32] 30,000 [23],[32] 30,000 [23],[32] 30,000 [23],[32] 30,000 [23],[32] 30,000 [23],[32]  
Amortized Cost $ 3.0 [15]             $ 3.0 [23],[32]              
Fair Value $ 10.3 [1],[15]             $ 4.3 [2],[23],[32]              
Investment, Identifier [Axis]: Premium Credit Ltd 1                              
Variable Rate [24],[32]               6.50% 6.50% 6.50% 6.50% 6.50% 6.50% 6.50%  
Floor Rate [24],[32]               0.00% 0.00% 0.00% 0.00% 0.00% 0.00% 0.00%  
Principal Amount | € [6],[24],[32]                     € 55.9        
Amortized Cost [24],[32]               $ 72.6              
Fair Value [2],[24],[32]               $ 75.7              
Investment, Identifier [Axis]: Pretium Partners LLC P1, Structured Mezzanine 1                              
Variable Rate               2.80% 2.80% 2.80% 2.80% 2.80% 2.80% 2.80%  
PIK Rate               5.30% 5.30% 5.30% 5.30% 5.30% 5.30% 5.30%  
Investment, Identifier [Axis]: Pretium Partners LLC P1, Structured Mezzanine 1 | Maximum                              
PIK Rate               5.30% 5.30% 5.30% 5.30% 5.30% 5.30% 5.30%  
Investment, Identifier [Axis]: Pretium Partners LLC P1, Structured Mezzanine, Real Estate                              
Rate [7],[24],[32]               2.80% 2.80% 2.80% 2.80% 2.80% 2.80% 2.80%  
PIK Rate [7],[24],[32]               5.30% 5.30% 5.30% 5.30% 5.30% 5.30% 5.30%  
Principal Amount [6],[24],[32]               $ 6.7              
Amortized Cost [24],[32]               6.2              
Fair Value [2],[24],[32]               $ 6.8              
Investment, Identifier [Axis]: Pretium Partners LLC P1, Structured Mezzanine, Real Estate | Maximum                              
PIK Rate [7],[24],[32]               5.30% 5.30% 5.30% 5.30% 5.30% 5.30% 5.30%  
Investment, Identifier [Axis]: Pretium Partners LLC P2, Private Equity, Real Estate                              
Number of Shares | shares [6],[23],[24],[32]               16,772,368 16,772,368 16,772,368 16,772,368 16,772,368 16,772,368 16,772,368  
Amortized Cost [23],[24],[32]               $ 16.4              
Fair Value [2],[23],[24],[32]               $ 16.4              
Investment, Identifier [Axis]: Pretium Partners LLC P2, Term Loan, Real Estate                              
Rate 11.00% [12],[15],[29] 11.00% [12],[15],[29] 11.00% [12],[15],[29] 11.00% [12],[15],[29] 11.00% [12],[15],[29] 11.00% [12],[15],[29] 11.00% [12],[15],[29] 11.00% [7],[24],[32] 11.00% [7],[24],[32] 11.00% [7],[24],[32] 11.00% [7],[24],[32] 11.00% [7],[24],[32] 11.00% [7],[24],[32] 11.00% [7],[24],[32]  
Principal Amount $ 33.5 [15],[17],[29]             $ 33.5 [6],[24],[32]              
Amortized Cost 33.0 [15],[29]             32.9 [24],[32]              
Fair Value $ 32.9 [3],[15],[29]             $ 32.9 [2],[24],[32]              
Investment, Identifier [Axis]: Prime ST LLC, Private Equity, Real Estate                              
Number of Shares | shares 5,666,079 [15],[28],[29],[30] 5,666,079 [15],[28],[29],[30] 5,666,079 [15],[28],[29],[30] 5,666,079 [15],[28],[29],[30] 5,666,079 [15],[28],[29],[30] 5,666,079 [15],[28],[29],[30] 5,666,079 [15],[28],[29],[30] 5,983,135 [6],[23],[24],[31],[32] 5,983,135 [6],[23],[24],[31],[32] 5,983,135 [6],[23],[24],[31],[32] 5,983,135 [6],[23],[24],[31],[32] 5,983,135 [6],[23],[24],[31],[32] 5,983,135 [6],[23],[24],[31],[32] 5,983,135 [6],[23],[24],[31],[32]  
Amortized Cost $ 7.4 [15],[28],[29],[30]             $ 7.7 [23],[24],[31],[32]              
Fair Value $ 0.0 [3],[15],[28],[29],[30]             $ 9.1 [2],[23],[24],[31],[32]              
Investment, Identifier [Axis]: Prime ST LLC, Structured Mezzanine, Real Estate                              
Rate 5.00% [12],[15],[29],[30] 5.00% [12],[15],[29],[30] 5.00% [12],[15],[29],[30] 5.00% [12],[15],[29],[30] 5.00% [12],[15],[29],[30] 5.00% [12],[15],[29],[30] 5.00% [12],[15],[29],[30] 5.00% [7],[24],[31],[32] 5.00% [7],[24],[31],[32] 5.00% [7],[24],[31],[32] 5.00% [7],[24],[31],[32] 5.00% [7],[24],[31],[32] 5.00% [7],[24],[31],[32] 5.00% [7],[24],[31],[32]  
PIK Rate 6.00% [12],[15],[29],[30] 6.00% [12],[15],[29],[30] 6.00% [12],[15],[29],[30] 6.00% [12],[15],[29],[30] 6.00% [12],[15],[29],[30] 6.00% [12],[15],[29],[30] 6.00% [12],[15],[29],[30] 6.00% [7],[24],[31],[32] 6.00% [7],[24],[31],[32] 6.00% [7],[24],[31],[32] 6.00% [7],[24],[31],[32] 6.00% [7],[24],[31],[32] 6.00% [7],[24],[31],[32] 6.00% [7],[24],[31],[32]  
Principal Amount $ 55.5 [15],[17],[29],[30]             $ 52.4 [6],[24],[31],[32]              
Amortized Cost 53.7 [15],[29],[30]             50.4 [24],[31],[32]              
Fair Value $ 43.5 [3],[15],[29],[30]             $ 52.4 [2],[24],[31],[32]              
Investment, Identifier [Axis]: Prime ST LLC, Structured Mezzanine, Real Estate | Maximum                              
PIK Rate 6.00% [12],[15],[29],[30] 6.00% [12],[15],[29],[30] 6.00% [12],[15],[29],[30] 6.00% [12],[15],[29],[30] 6.00% [12],[15],[29],[30] 6.00% [12],[15],[29],[30] 6.00% [12],[15],[29],[30] 6.00% [7],[24],[31],[32] 6.00% [7],[24],[31],[32] 6.00% [7],[24],[31],[32] 6.00% [7],[24],[31],[32] 6.00% [7],[24],[31],[32] 6.00% [7],[24],[31],[32] 6.00% [7],[24],[31],[32]  
Investment, Identifier [Axis]: Prime St LLC, Private Equity                              
Fair Value $ 0.0             $ 9.1             3.9
Investment, Identifier [Axis]: Prime St LLC, Structured Mezzanine                              
Fair Value 43.5             52.4             22.8
Investment, Identifier [Axis]: Production Resource Group LLC 1                              
Fair Value 152.5             133.3             0.0
Investment, Identifier [Axis]: Production Resource Group LLC 2                              
Fair Value 0.1             0.1             0.0
Investment, Identifier [Axis]: Production Resource Group LLC 3                              
Fair Value 68.1             64.4             0.0
Investment, Identifier [Axis]: Production Resource Group LLC 4                              
Fair Value $ 31.3             20.2             0.0
Investment, Identifier [Axis]: Production Resource Group LLC, Media & Entertainment 1                              
Variable Rate [12],[15],[30] 5.00% 5.00% 5.00% 5.00% 5.00% 5.00% 5.00%                
PIK Rate [12],[15],[30] 3.10% 3.10% 3.10% 3.10% 3.10% 3.10% 3.10%                
Floor Rate [15],[30] 1.00% 1.00% 1.00% 1.00% 1.00% 1.00% 1.00%                
Principal Amount [15],[17],[30] $ 62.7                            
Amortized Cost [15],[30] 59.9                            
Fair Value [3],[15],[30] $ 64.6                            
Investment, Identifier [Axis]: Production Resource Group LLC, Media & Entertainment 1 | Maximum                              
PIK Rate [12],[15],[30] 3.10% 3.10% 3.10% 3.10% 3.10% 3.10% 3.10%                
Investment, Identifier [Axis]: Production Resource Group LLC, Media & Entertainment 2                              
Variable Rate [12],[15],[30] 3.00% 3.00% 3.00% 3.00% 3.00% 3.00% 3.00%                
PIK Rate [12],[15],[30] 5.50% 5.50% 5.50% 5.50% 5.50% 5.50% 5.50%                
Floor Rate [15],[30] 0.30% 0.30% 0.30% 0.30% 0.30% 0.30% 0.30%                
Principal Amount [15],[17],[30] $ 149.6                            
Amortized Cost [15],[30] 143.9                            
Fair Value [3],[15],[30] $ 152.5                            
Investment, Identifier [Axis]: Production Resource Group LLC, Media & Entertainment 2 | Maximum                              
PIK Rate [12],[15],[30] 5.50% 5.50% 5.50% 5.50% 5.50% 5.50% 5.50%                
Investment, Identifier [Axis]: Production Resource Group LLC, Media & Entertainment 3                              
Variable Rate [12],[15],[30] 5.50% 5.50% 5.50% 5.50% 5.50% 5.50% 5.50%                
Floor Rate [15],[30] 1.00% 1.00% 1.00% 1.00% 1.00% 1.00% 1.00%                
Principal Amount [15],[17],[30] $ 0.1                            
Amortized Cost [15],[30] 0.1                            
Fair Value [3],[15],[30] $ 0.1                            
Investment, Identifier [Axis]: Production Resource Group LLC, Media & Entertainment 3 | Maximum                              
Variable Rate [12],[15],[30] 5.50% 5.50% 5.50% 5.50% 5.50% 5.50% 5.50%                
Investment, Identifier [Axis]: Production Resource Group LLC, Media & Entertainment 4                              
Variable Rate [12],[15],[30] 5.00% 5.00% 5.00% 5.00% 5.00% 5.00% 5.00%                
PIK Rate [12],[15],[30] 3.10% 3.10% 3.10% 3.10% 3.10% 3.10% 3.10%                
Floor Rate [15],[30] 1.00% 1.00% 1.00% 1.00% 1.00% 1.00% 1.00%                
Principal Amount [15],[17],[30] $ 34.4                            
Amortized Cost [15],[30] 34.3                            
Fair Value [3],[15],[30] $ 34.8                            
Investment, Identifier [Axis]: Production Resource Group LLC, Media & Entertainment 4 | Maximum                              
PIK Rate [12],[15],[30] 3.10% 3.10% 3.10% 3.10% 3.10% 3.10% 3.10%                
Investment, Identifier [Axis]: Production Resource Group LLC, Preferred Stock, Series A PIK                              
Fair Value               17.4             0.0
Investment, Identifier [Axis]: Production Resource Group LLC, Preferred Stock, Series B PIK                              
Fair Value               $ 0.0             0.0
Investment, Identifier [Axis]: Production Resource Group LLC, Senior Secured Loans—First Lien, Media & Entertainment -1                              
Variable Rate [31],[32]               5.00% 5.00% 5.00% 5.00% 5.00% 5.00% 5.00%  
PIK Rate [31],[32]               3.10% 3.10% 3.10% 3.10% 3.10% 3.10% 3.10%  
Floor Rate [31],[32]               1.00% 1.00% 1.00% 1.00% 1.00% 1.00% 1.00%  
Principal Amount [6],[31],[32]               $ 64.4              
Amortized Cost [31],[32]               60.2              
Fair Value [2],[31],[32]               $ 64.4              
Investment, Identifier [Axis]: Production Resource Group LLC, Senior Secured Loans—First Lien, Media & Entertainment -1 | Maximum                              
PIK Rate [31],[32]               3.10% 3.10% 3.10% 3.10% 3.10% 3.10% 3.10%  
Investment, Identifier [Axis]: Production Resource Group LLC, Senior Secured Loans—First Lien, Media & Entertainment -2                              
Variable Rate [31],[32]               3.00% 3.00% 3.00% 3.00% 3.00% 3.00% 3.00%  
PIK Rate [31],[32]               5.50% 5.50% 5.50% 5.50% 5.50% 5.50% 5.50%  
Floor Rate [31],[32]               0.30% 0.30% 0.30% 0.30% 0.30% 0.30% 0.30%  
Principal Amount [6],[31],[32]               $ 133.3              
Amortized Cost [31],[32]               124.9              
Fair Value [2],[31],[32]               $ 133.3              
Investment, Identifier [Axis]: Production Resource Group LLC, Senior Secured Loans—First Lien, Media & Entertainment -2 | Maximum                              
PIK Rate [31],[32]               5.50% 5.50% 5.50% 5.50% 5.50% 5.50% 5.50%  
Investment, Identifier [Axis]: Production Resource Group LLC, Senior Secured Loans—First Lien, Media & Entertainment -3                              
Variable Rate [31],[32]               5.50% 5.50% 5.50% 5.50% 5.50% 5.50% 5.50%  
Floor Rate [31],[32]               1.00% 1.00% 1.00% 1.00% 1.00% 1.00% 1.00%  
Principal Amount [6],[31],[32]               $ 0.1              
Amortized Cost [31],[32]               0.1              
Fair Value [2],[31],[32]               $ 0.1              
Investment, Identifier [Axis]: Production Resource Group LLC, Senior Secured Loans—First Lien, Media & Entertainment -3 | Maximum                              
Variable Rate [31],[32]               5.50% 5.50% 5.50% 5.50% 5.50% 5.50% 5.50%  
Investment, Identifier [Axis]: Production Resource Group LLC, Senior Secured Loans—First Lien, Media & Entertainment -4                              
Variable Rate [31],[32]               7.50% 7.50% 7.50% 7.50% 7.50% 7.50% 7.50%  
PIK Rate [31],[32]               0.00% 0.00% 0.00% 0.00% 0.00% 0.00% 0.00%  
Floor Rate [31],[32]               1.00% 1.00% 1.00% 1.00% 1.00% 1.00% 1.00%  
Principal Amount [6],[31],[32]               $ 20.2              
Amortized Cost [31],[32]               20.1              
Fair Value [2],[31],[32]               $ 20.2              
Investment, Identifier [Axis]: Production Resource Group LLC, Senior Secured Loans—First Lien, Media & Entertainment -4 | Maximum                              
PIK Rate [31],[32]               3.10% 3.10% 3.10% 3.10% 3.10% 3.10% 3.10%  
Investment, Identifier [Axis]: Production Resource Group LLC, Senior Secured Loans—First Lien, Media & Entertainment -5                              
Variable Rate [5],[31]               7.50% 7.50% 7.50% 7.50% 7.50% 7.50% 7.50%  
PIK Rate [5],[31]               0.00% 0.00% 0.00% 0.00% 0.00% 0.00% 0.00%  
Floor Rate [5],[31]               1.00% 1.00% 1.00% 1.00% 1.00% 1.00% 1.00%  
Principal Amount [5],[6],[31]               $ 10.1              
Amortized Cost [5],[31]               10.1              
Fair Value [2],[5],[31]               $ 10.1              
Investment, Identifier [Axis]: Production Resource Group LLC, Senior Secured Loans—First Lien, Media & Entertainment -5 | Maximum                              
PIK Rate [5],[31]               3.10% 3.10% 3.10% 3.10% 3.10% 3.10% 3.10%  
Investment, Identifier [Axis]: Propulsion Acquisition LLC                              
Variable Rate [9],[32],[33],[38],[43]               7.00% 7.00% 7.00% 7.00% 7.00% 7.00% 7.00%  
Floor Rate [9],[32],[33],[38],[43]               1.00% 1.00% 1.00% 1.00% 1.00% 1.00% 1.00%  
Principal Amount [6],[9],[32],[33],[38],[43]               $ 60.5              
Amortized Cost [9],[32],[33],[38],[43]               56.8              
Fair Value [2],[9],[32],[33],[38],[43]               61.1              
Investment, Identifier [Axis]: Proserv Acquisition LLC, Class A Common Units                              
Fair Value $ 1.1             $ 0.1             9.0
Investment, Identifier [Axis]: Proserv Acquisition LLC, Class A Common Units, Energy                              
Number of Shares | shares 2,635,005 [15],[28],[29],[41] 2,635,005 [15],[28],[29],[41] 2,635,005 [15],[28],[29],[41] 2,635,005 [15],[28],[29],[41] 2,635,005 [15],[28],[29],[41] 2,635,005 [15],[28],[29],[41] 2,635,005 [15],[28],[29],[41] 2,635,005 [23],[24],[32],[42] 2,635,005 [23],[24],[32],[42] 2,635,005 [23],[24],[32],[42] 2,635,005 [23],[24],[32],[42] 2,635,005 [23],[24],[32],[42] 2,635,005 [23],[24],[32],[42] 2,635,005 [23],[24],[32],[42]  
Amortized Cost $ 33.5 [15],[28],[29],[41]             $ 33.4 [23],[24],[32],[42]              
Fair Value 1.1 [1],[15],[28],[29],[41]             0.1 [2],[23],[24],[32],[42]              
Investment, Identifier [Axis]: Proserv Acquisition LLC, Class A Preferred Units                              
Fair Value $ 9.5             $ 9.3             9.5
Investment, Identifier [Axis]: Proserv Acquisition LLC, Class A Preferred Units, Energy                              
Number of Shares | shares 837,780 [15],[28],[29],[41] 837,780 [15],[28],[29],[41] 837,780 [15],[28],[29],[41] 837,780 [15],[28],[29],[41] 837,780 [15],[28],[29],[41] 837,780 [15],[28],[29],[41] 837,780 [15],[28],[29],[41] 837,780 [23],[24],[32],[42] 837,780 [23],[24],[32],[42] 837,780 [23],[24],[32],[42] 837,780 [23],[24],[32],[42] 837,780 [23],[24],[32],[42] 837,780 [23],[24],[32],[42] 837,780 [23],[24],[32],[42]  
Amortized Cost $ 5.4 [15],[28],[29],[41]             $ 5.4 [23],[24],[32],[42]              
Fair Value $ 9.5 [1],[15],[28],[29],[41]             $ 9.3 [2],[23],[24],[32],[42]              
Investment, Identifier [Axis]: Pure Fishing Inc 1                              
Variable Rate [32],[39],[43]               8.38% 8.38% 8.38% 8.38% 8.38% 8.38% 8.38%  
Floor Rate [32],[39],[43]               1.00% 1.00% 1.00% 1.00% 1.00% 1.00% 1.00%  
Principal Amount [6],[32],[39],[43]               $ 177.0              
Amortized Cost [32],[39],[43]               170.6              
Fair Value [2],[32],[39],[43]               $ 168.1              
Investment, Identifier [Axis]: Pure Fishing Inc, Consumer Durables & Apparel 1                              
Variable Rate [12],[15],[37] 4.50% 4.50% 4.50% 4.50% 4.50% 4.50% 4.50%                
Floor Rate [15],[37] 0.00% 0.00% 0.00% 0.00% 0.00% 0.00% 0.00%                
Principal Amount [15],[17],[37] $ 33.7                            
Amortized Cost [15],[37] 33.2                            
Fair Value [3],[15],[37] $ 22.6                            
Investment, Identifier [Axis]: Pure Fishing Inc, Consumer Durables & Apparel 2                              
Variable Rate [12] 8.38% 8.38% 8.38% 8.38% 8.38% 8.38% 8.38%                
Floor Rate [15],[40] 1.00% 1.00% 1.00% 1.00% 1.00% 1.00% 1.00%                
Principal Amount [15],[17],[40] $ 100.0                            
Amortized Cost [15],[40] 95.3                            
Fair Value [3],[15],[40] $ 56.1                            
Investment, Identifier [Axis]: Qdoba Restaurant Corp                              
Variable Rate [32],[36],[39]               7.00% 7.00% 7.00% 7.00% 7.00% 7.00% 7.00%  
Floor Rate [32],[36],[39]               1.00% 1.00% 1.00% 1.00% 1.00% 1.00% 1.00%  
Principal Amount [6],[32],[36],[39]               $ 10.9              
Amortized Cost [32],[36],[39]               10.8              
Fair Value [2],[32],[36],[39]               $ 10.8              
Investment, Identifier [Axis]: Quorum Health Corp, Trade Claim, Health Care Equipment & Services                              
Number of Shares | shares 8,301,000 [15],[28] 8,301,000 [15],[28] 8,301,000 [15],[28] 8,301,000 [15],[28] 8,301,000 [15],[28] 8,301,000 [15],[28] 8,301,000 [15],[28] 8,301,000 [23],[32] 8,301,000 [23],[32] 8,301,000 [23],[32] 8,301,000 [23],[32] 8,301,000 [23],[32] 8,301,000 [23],[32] 8,301,000 [23],[32]  
Amortized Cost $ 0.7 [15],[28]             $ 0.7 [23],[32]              
Fair Value $ 0.9 [1],[15],[28]             $ 0.9 [2],[23],[32]              
Investment, Identifier [Axis]: Quorum Health Corp, Trust Initial Funding Units, Health Care Equipment & Services                              
Number of Shares | shares 143,400 [15],[28] 143,400 [15],[28] 143,400 [15],[28] 143,400 [15],[28] 143,400 [15],[28] 143,400 [15],[28] 143,400 [15],[28] 143,400 [23],[32] 143,400 [23],[32] 143,400 [23],[32] 143,400 [23],[32] 143,400 [23],[32] 143,400 [23],[32] 143,400 [23],[32]  
Amortized Cost $ 0.2 [15],[28]             $ 0.2 [23],[32]              
Fair Value $ 0.2 [1],[15],[28]             $ 0.2 [2],[23],[32]              
Investment, Identifier [Axis]: RSC Insurance Brokerage Inc, Senior Secured Loans—First Lien, Insurance -1                              
Variable Rate [8],[9],[10],[32],[33],[39],[43]               5.50% 5.50% 5.50% 5.50% 5.50% 5.50% 5.50%  
Floor Rate [8],[9],[10],[32],[33],[39],[43]               0.80% 0.80% 0.80% 0.80% 0.80% 0.80% 0.80%  
Principal Amount [6],[8],[9],[10],[32],[33],[39],[43]               $ 277.8              
Amortized Cost [8],[9],[10],[32],[33],[39],[43]               268.1              
Fair Value [2],[8],[9],[10],[32],[33],[39],[43]               $ 280.6              
Investment, Identifier [Axis]: RSC Insurance Brokerage Inc, Senior Secured Loans—First Lien, Insurance -2                              
Variable Rate [32]               5.50% 5.50% 5.50% 5.50% 5.50% 5.50% 5.50%  
Floor Rate [32]               0.80% 0.80% 0.80% 0.80% 0.80% 0.80% 0.80%  
Principal Amount [6],[32]               $ 4.1              
Amortized Cost [32]               4.0              
Fair Value [2],[32]               $ 4.1              
Investment, Identifier [Axis]: RSC Insurance Brokerage Inc, Senior Secured Loans—First Lien, Insurance -3                              
Variable Rate [5]               5.50% 5.50% 5.50% 5.50% 5.50% 5.50% 5.50%  
Floor Rate [5]               0.80% 0.80% 0.80% 0.80% 0.80% 0.80% 0.80%  
Principal Amount [5],[6]               $ 16.1              
Amortized Cost [5]               16.1              
Fair Value [2],[5]               $ 16.3              
Investment, Identifier [Axis]: RSC Insurance Brokerage Inc, Senior Secured Loans—First Lien, Insurance -4                              
Variable Rate [5]               5.50% 5.50% 5.50% 5.50% 5.50% 5.50% 5.50%  
Floor Rate [5]               0.80% 0.80% 0.80% 0.80% 0.80% 0.80% 0.80%  
Principal Amount [5],[6]               $ 3.6              
Amortized Cost [5]               3.6              
Fair Value [2],[5]               $ 3.6              
Investment, Identifier [Axis]: RSC Insurance Brokerage Inc, Insurance 1                              
Variable Rate [12],[13],[14],[15],[16],[34],[40] 5.50% 5.50% 5.50% 5.50% 5.50% 5.50% 5.50%                
Floor Rate [13],[14],[15],[16],[34],[40] 0.80% 0.80% 0.80% 0.80% 0.80% 0.80% 0.80%                
Principal Amount [13],[14],[15],[16],[17],[34],[40] $ 240.0                            
Amortized Cost [13],[14],[15],[16],[34],[40] 234.3                            
Fair Value [3],[13],[14],[15],[16],[34],[40] $ 236.0                            
Investment, Identifier [Axis]: RSC Insurance Brokerage Inc, Insurance 2                              
Variable Rate [4],[12] 5.50% 5.50% 5.50% 5.50% 5.50% 5.50% 5.50%                
Floor Rate [4] 0.80% 0.80% 0.80% 0.80% 0.80% 0.80% 0.80%                
Principal Amount [4],[17] $ 7.7                            
Amortized Cost [4] 7.6                            
Fair Value [3],[4] $ 7.6                            
Investment, Identifier [Axis]: Radwell International LLC/PA, Capital Goods 1                              
Variable Rate [12],[15] 6.53% 6.53% 6.53% 6.53% 6.53% 6.53% 6.53%                
Floor Rate [15] 0.80% 0.80% 0.80% 0.80% 0.80% 0.80% 0.80%                
Principal Amount [15],[17] $ 1.0                            
Amortized Cost [15] 1.0                            
Fair Value [3],[15] $ 1.0                            
Investment, Identifier [Axis]: Radwell International LLC/PA, Capital Goods 2                              
Variable Rate [12] 6.75% 6.75% 6.75% 6.75% 6.75% 6.75% 6.75%                
Floor Rate [13],[14],[16],[19] 0.80% 0.80% 0.80% 0.80% 0.80% 0.80% 0.80%                
Principal Amount [13],[14],[16],[17],[19] $ 92.1                            
Amortized Cost [13],[14],[16],[19] 92.1                            
Fair Value [3],[13],[14],[16],[19] $ 92.1                            
Investment, Identifier [Axis]: Radwell International LLC/PA, Capital Goods 3                              
Variable Rate [12] 6.75% 6.75% 6.75% 6.75% 6.75% 6.75% 6.75%                
Floor Rate [4] 0.80% 0.80% 0.80% 0.80% 0.80% 0.80% 0.80%                
Principal Amount [4],[17] $ 6.9                            
Amortized Cost [4] 6.9                            
Fair Value [3],[4] $ 6.9                            
Investment, Identifier [Axis]: Reliant Rehab Hospital Cincinnati LLC                              
Variable Rate [9],[10],[32],[33],[39],[43]               6.25% 6.25% 6.25% 6.25% 6.25% 6.25% 6.25%  
Floor Rate [9],[10],[32],[33],[39],[43]               0.00% 0.00% 0.00% 0.00% 0.00% 0.00% 0.00%  
Principal Amount [6],[9],[10],[32],[33],[39],[43]               $ 126.8              
Amortized Cost [9],[10],[32],[33],[39],[43]               120.7              
Fair Value [2],[9],[10],[32],[33],[39],[43]               $ 124.1              
Investment, Identifier [Axis]: Reliant Rehab Hospital Cincinnati LLC, Health Care Equipment & Services                              
Variable Rate [12],[14],[15],[16],[18],[34],[40] 6.25% 6.25% 6.25% 6.25% 6.25% 6.25% 6.25%                
Floor Rate [14],[15],[16],[18],[34],[40] 0.00% 0.00% 0.00% 0.00% 0.00% 0.00% 0.00%                
Principal Amount [14],[15],[16],[17],[18],[34],[40] $ 106.1                            
Amortized Cost [14],[15],[16],[18],[34],[40] 101.1                            
Fair Value [3],[14],[15],[16],[18],[34],[40] $ 84.2                            
Investment, Identifier [Axis]: Revere Superior Holdings Inc, Senior Secured Loans—First Lien, Software & Services - 1                              
Variable Rate [32],[39]               5.75% 5.75% 5.75% 5.75% 5.75% 5.75% 5.75%  
Floor Rate [32],[39]               1.00% 1.00% 1.00% 1.00% 1.00% 1.00% 1.00%  
Principal Amount [6],[32],[39]               $ 23.0              
Amortized Cost [32],[39]               22.4              
Fair Value [2],[32],[39]               $ 23.3              
Investment, Identifier [Axis]: Revere Superior Holdings Inc, Senior Secured Loans—First Lien, Software & Services - 2                              
Variable Rate [32]               5.75% 5.75% 5.75% 5.75% 5.75% 5.75% 5.75%  
Floor Rate [32]               1.00% 1.00% 1.00% 1.00% 1.00% 1.00% 1.00%  
Principal Amount [6],[32]               $ 3.3              
Amortized Cost [32]               3.3              
Fair Value [2],[32]               $ 3.4              
Investment, Identifier [Axis]: Revere Superior Holdings Inc, Senior Secured Loans—First Lien, Software & Services - 3                              
Variable Rate [5]               5.75% 5.75% 5.75% 5.75% 5.75% 5.75% 5.75%  
Floor Rate [5]               1.00% 1.00% 1.00% 1.00% 1.00% 1.00% 1.00%  
Principal Amount [5],[6]               $ 3.2              
Amortized Cost [5]               3.2              
Fair Value [2],[5]               $ 3.2              
Investment, Identifier [Axis]: Revere Superior Holdings Inc, Senior Secured Loans—First Lien, Software & Services - 4                              
Variable Rate [5]               5.75% 5.75% 5.75% 5.75% 5.75% 5.75% 5.75%  
Floor Rate [5]               1.00% 1.00% 1.00% 1.00% 1.00% 1.00% 1.00%  
Principal Amount [5],[6]               $ 7.4              
Amortized Cost [5]               7.4              
Fair Value [2],[5]               $ 7.5              
Investment, Identifier [Axis]: Revere Superior Holdings Inc, Software & Services 1                              
Variable Rate [12],[15],[40] 5.75% 5.75% 5.75% 5.75% 5.75% 5.75% 5.75%                
Floor Rate [15],[40] 1.00% 1.00% 1.00% 1.00% 1.00% 1.00% 1.00%                
Principal Amount [15],[17],[40] $ 33.5                            
Amortized Cost [15],[40] 32.9                            
Fair Value [3],[15],[40] $ 33.5                            
Investment, Identifier [Axis]: Revere Superior Holdings Inc, Software & Services 2                              
Variable Rate [12],[15] 5.75% 5.75% 5.75% 5.75% 5.75% 5.75% 5.75%                
Floor Rate [15] 1.00% 1.00% 1.00% 1.00% 1.00% 1.00% 1.00%                
Principal Amount [15],[17] $ 1.5                            
Amortized Cost [15] 1.5                            
Fair Value [3],[15] $ 1.5                            
Investment, Identifier [Axis]: Revere Superior Holdings Inc, Software & Services 3                              
Variable Rate [4],[12] 5.75% 5.75% 5.75% 5.75% 5.75% 5.75% 5.75%                
Floor Rate [4] 1.00% 1.00% 1.00% 1.00% 1.00% 1.00% 1.00%                
Principal Amount [4],[17] $ 1.7                            
Amortized Cost [4] 1.7                            
Fair Value [3],[4] $ 1.7                            
Investment, Identifier [Axis]: Ridgeback Resources Inc, Common Stock, Energy                              
Number of Shares | shares 1,969,418 [15],[29],[53],[54] 1,969,418 [15],[29],[53],[54] 1,969,418 [15],[29],[53],[54] 1,969,418 [15],[29],[53],[54] 1,969,418 [15],[29],[53],[54] 1,969,418 [15],[29],[53],[54] 1,969,418 [15],[29],[53],[54] 1,969,418 [11],[23],[24],[32],[52] 1,969,418 [11],[23],[24],[32],[52] 1,969,418 [11],[23],[24],[32],[52] 1,969,418 [11],[23],[24],[32],[52] 1,969,418 [11],[23],[24],[32],[52] 1,969,418 [11],[23],[24],[32],[52] 1,969,418 [11],[23],[24],[32],[52]  
Amortized Cost $ 6.4 [15],[29],[53],[54]             $ 9.1 [11],[23],[24],[32],[52]              
Fair Value $ 8.6 [1],[15],[29],[53],[54]             $ 9.9 [2],[11],[23],[24],[32],[52]              
Investment, Identifier [Axis]: Rise Baking Company, Senior Secured Loans—First Lien, Food, Beverage & Tobacco -1                              
Variable Rate [32]               6.25% 6.25% 6.25% 6.25% 6.25% 6.25% 6.25%  
Floor Rate [32]               1.00% 1.00% 1.00% 1.00% 1.00% 1.00% 1.00%  
Principal Amount [6],[32]               $ 2.8              
Amortized Cost [32]               2.6              
Fair Value [2],[32]               $ 2.7              
Investment, Identifier [Axis]: Rise Baking Company, Senior Secured Loans—First Lien, Food, Beverage & Tobacco -2                              
Variable Rate [9],[39]               6.25% 6.25% 6.25% 6.25% 6.25% 6.25% 6.25%  
Floor Rate [9],[39]               1.00% 1.00% 1.00% 1.00% 1.00% 1.00% 1.00%  
Principal Amount [6],[9],[39]               $ 28.8              
Amortized Cost [9],[39]               28.1              
Fair Value [2],[9],[39]               $ 28.2              
Investment, Identifier [Axis]: Rise Baking Company, Senior Secured Loans—First Lien, Food, Beverage & Tobacco -3                              
Variable Rate [5]               6.25% 6.25% 6.25% 6.25% 6.25% 6.25% 6.25%  
Floor Rate [5]               1.00% 1.00% 1.00% 1.00% 1.00% 1.00% 1.00%  
Principal Amount [5],[6]               $ 2.5              
Amortized Cost [5]               2.5              
Fair Value [2],[5]               2.5              
Investment, Identifier [Axis]: Rise Baking Company, Food, Beverage & Tobacco 1                              
Variable Rate [12],[15] 6.50% 6.50% 6.50% 6.50% 6.50% 6.50% 6.50%                
Floor Rate [15] 1.00% 1.00% 1.00% 1.00% 1.00% 1.00% 1.00%                
Principal Amount [15],[17] $ 1.4                            
Amortized Cost [15] 1.3                            
Fair Value [3],[15] $ 1.3                            
Investment, Identifier [Axis]: Rise Baking Company, Food, Beverage & Tobacco 2                              
Variable Rate [12],[14],[40] 6.50% 6.50% 6.50% 6.50% 6.50% 6.50% 6.50%                
Floor Rate [14],[40] 1.00% 1.00% 1.00% 1.00% 1.00% 1.00% 1.00%                
Principal Amount [14],[17],[40] $ 28.5                            
Amortized Cost [14],[40] 28.0                            
Fair Value [3],[14],[40] $ 27.4                            
Investment, Identifier [Axis]: Rise Baking Company, Food, Beverage & Tobacco 3                              
Variable Rate [4],[12] 6.50% 6.50% 6.50% 6.50% 6.50% 6.50% 6.50%                
Floor Rate [4] 1.00% 1.00% 1.00% 1.00% 1.00% 1.00% 1.00%                
Principal Amount [4],[17] $ 3.9                            
Amortized Cost [4] 3.9                            
Fair Value [3],[4] 3.7                            
Investment, Identifier [Axis]: Roemanu LLC (FKA Toorak Capital Partners LLC), Private Equity                              
Fair Value $ 261.2             199.3              
Investment, Identifier [Axis]: Roemanu LLC (FKA Toorak Capital Partners LLC), Private Equity, Real Estate                              
Number of Shares | shares [15],[30] 220,778,388 220,778,388 220,778,388 220,778,388 220,778,388 220,778,388 220,778,388                
Amortized Cost [15],[30] $ 236.4                            
Fair Value [3],[15],[30] 261.2                            
Investment, Identifier [Axis]: Roemanu LLC (FKA Toorak Capital Partners LLC), Structured Mezzanine                              
Fair Value $ 0.0             $ 22.0              
Investment, Identifier [Axis]: SAMBA Safety Inc, Senior Secured Loans—First Lien, Software & Services -1                              
Variable Rate [5]               5.75% 5.75% 5.75% 5.75% 5.75% 5.75% 5.75%  
Floor Rate [5]               1.00% 1.00% 1.00% 1.00% 1.00% 1.00% 1.00%  
Principal Amount [5],[6]               $ 2.4              
Amortized Cost [5]               2.4              
Fair Value [2],[5]               $ 2.4              
Investment, Identifier [Axis]: SAMBA Safety Inc, Senior Secured Loans—First Lien, Software & Services -2                              
Variable Rate [5]               5.75% 5.75% 5.75% 5.75% 5.75% 5.75% 5.75%  
Floor Rate [5]               1.00% 1.00% 1.00% 1.00% 1.00% 1.00% 1.00%  
Principal Amount [5],[6]               $ 6.1              
Amortized Cost [5]               6.1              
Fair Value [2],[5]               $ 6.0              
Investment, Identifier [Axis]: SAMBA Safety Inc, Software & Services 1                              
Variable Rate [12],[15] 5.25% 5.25% 5.25% 5.25% 5.25% 5.25% 5.25%                
Floor Rate [40] 1.00% 1.00% 1.00% 1.00% 1.00% 1.00% 1.00%                
Principal Amount [17],[40] $ 6.1                            
Amortized Cost [40] 6.0                            
Fair Value [3],[40] $ 6.0                            
Investment, Identifier [Axis]: SAMBA Safety Inc, Software & Services 2                              
Variable Rate [4],[12] 5.25% 5.25% 5.25% 5.25% 5.25% 5.25% 5.25%                
Floor Rate [4] 1.00% 1.00% 1.00% 1.00% 1.00% 1.00% 1.00%                
Principal Amount [4],[17] $ 2.4                            
Amortized Cost [4] 2.4                            
Fair Value [3],[4] $ 2.4                            
Investment, Identifier [Axis]: SIRVA Worldwide Inc                              
Variable Rate [32],[36]               9.50% 9.50% 9.50% 9.50% 9.50% 9.50% 9.50%  
Floor Rate [32],[36]               0.00% 0.00% 0.00% 0.00% 0.00% 0.00% 0.00%  
Principal Amount [6],[32],[36]               $ 6.5              
Amortized Cost [32],[36]               5.4              
Fair Value [2],[32],[36]               $ 5.7              
Investment, Identifier [Axis]: Safe-Guard Products International LLC                              
Variable Rate [38],[39],[43]               5.00% 5.00% 5.00% 5.00% 5.00% 5.00% 5.00%  
Floor Rate [38],[39],[43]               0.50% 0.50% 0.50% 0.50% 0.50% 0.50% 0.50%  
Principal Amount [6],[38],[39],[43]               $ 45.1              
Amortized Cost [38],[39],[43]               42.5              
Fair Value [2],[38],[39],[43]               $ 45.1              
Investment, Identifier [Axis]: Safe-Guard Products International LLC, Diversified Financials                              
Variable Rate [12],[18] 5.00% 5.00% 5.00% 5.00% 5.00% 5.00% 5.00%                
Floor Rate [18] 0.50% 0.50% 0.50% 0.50% 0.50% 0.50% 0.50%                
Principal Amount [17],[18] $ 0.1                            
Amortized Cost [18] 0.1                            
Fair Value [3],[18] $ 0.1                            
Investment, Identifier [Axis]: Saluda Grade Alternative Mortgage Trust 2022-BC2, Structured Mezzanine, Real Estate 1                              
Rate [12],[15],[29] 8.00% 8.00% 8.00% 8.00% 8.00% 8.00% 8.00%                
Principal Amount [15],[17],[29] $ 5.7                            
Amortized Cost [15],[29] 5.7                            
Fair Value [3],[15],[29] $ 5.7                            
Investment, Identifier [Axis]: Saluda Grade Alternative Mortgage Trust 2022-BC2, Structured Mezzanine, Real Estate 2                              
Rate [12],[15],[29] 18.00% 18.00% 18.00% 18.00% 18.00% 18.00% 18.00%                
Principal Amount [15],[17],[29] $ 3.4                            
Amortized Cost [15],[29] 2.3                            
Fair Value [3],[15],[29] $ 2.4                            
Investment, Identifier [Axis]: Saluda Grade Alternative Mortgage Trust 2022-BC2, Term Loan, Real Estate                              
Rate [12],[15],[29] 7.30% 7.30% 7.30% 7.30% 7.30% 7.30% 7.30%                
Principal Amount [15],[17],[29] $ 10.5                            
Amortized Cost [15],[29] 10.5                            
Fair Value [3],[15],[29] $ 10.3                            
Investment, Identifier [Axis]: SavATree LLC, Senior Secured Loans—First Lien, Consumer Services -1                              
Variable Rate [32]               5.50% 5.50% 5.50% 5.50% 5.50% 5.50% 5.50%  
Floor Rate [32]               0.80% 0.80% 0.80% 0.80% 0.80% 0.80% 0.80%  
Principal Amount [6],[32]               $ 1.9              
Amortized Cost [32]               1.8              
Fair Value [2],[32]               $ 1.9              
Investment, Identifier [Axis]: SavATree LLC, Senior Secured Loans—First Lien, Consumer Services -2                              
Variable Rate [5]               5.50% 5.50% 5.50% 5.50% 5.50% 5.50% 5.50%  
Floor Rate [5]               0.80% 0.80% 0.80% 0.80% 0.80% 0.80% 0.80%  
Principal Amount [5],[6]               $ 7.6              
Amortized Cost [5]               7.6              
Fair Value [2],[5]               $ 7.6              
Investment, Identifier [Axis]: SavATree LLC, Senior Secured Loans—First Lien, Consumer Services -3                              
Variable Rate [5]               5.50% 5.50% 5.50% 5.50% 5.50% 5.50% 5.50%  
Floor Rate [5]               0.80% 0.80% 0.80% 0.80% 0.80% 0.80% 0.80%  
Principal Amount [5],[6]               $ 6.3              
Amortized Cost [5]               6.3              
Fair Value [2],[5]               $ 6.3              
Investment, Identifier [Axis]: SavATree LLC, Consumer Services 1                              
Variable Rate [12],[15] 5.25% 5.25% 5.25% 5.25% 5.25% 5.25% 5.25%                
Floor Rate [15] 0.80% 0.80% 0.80% 0.80% 0.80% 0.80% 0.80%                
Principal Amount [15],[17] $ 5.5                            
Amortized Cost [15] 5.5                            
Fair Value [3],[15] $ 5.4                            
Investment, Identifier [Axis]: SavATree LLC, Consumer Services 2                              
Variable Rate [4],[12] 5.25% 5.25% 5.25% 5.25% 5.25% 5.25% 5.25%                
Floor Rate [4] 0.80% 0.80% 0.80% 0.80% 0.80% 0.80% 0.80%                
Principal Amount [4],[17] $ 4.0                            
Amortized Cost [4] 4.0                            
Fair Value [3],[4] $ 3.9                            
Investment, Identifier [Axis]: SavATree LLC, Consumer Services 3                              
Variable Rate [4],[12] 5.25% 5.25% 5.25% 5.25% 5.25% 5.25% 5.25%                
Floor Rate [4] 0.80% 0.80% 0.80% 0.80% 0.80% 0.80% 0.80%                
Principal Amount [4],[17] $ 6.3                            
Amortized Cost [4] 6.3                            
Fair Value [3],[4] $ 6.2                            
Investment, Identifier [Axis]: Sealane Trade Finance L+375                              
Variable Rate               3.75% 3.75% 3.75% 3.75% 3.75% 3.75% 3.75%  
Investment, Identifier [Axis]: Sealane Trade Finance L+963                              
Variable Rate               9.63% 9.63% 9.63% 9.63% 9.63% 9.63% 9.63%  
Investment, Identifier [Axis]: Sequa Corp                              
Variable Rate [32],[36],[39]               10.75% 10.75% 10.75% 10.75% 10.75% 10.75% 10.75%  
PIK Rate [32],[36],[39]               0.00% 0.00% 0.00% 0.00% 0.00% 0.00% 0.00%  
Floor Rate [32],[36],[39]               1.00% 1.00% 1.00% 1.00% 1.00% 1.00% 1.00%  
Principal Amount [6],[32],[36],[39]               $ 5.9              
Amortized Cost [32],[36],[39]               5.7              
Fair Value [2],[32],[36],[39]               $ 5.9              
Investment, Identifier [Axis]: Sequa Corp | Maximum                              
PIK Rate [32],[36],[39]               6.80% 6.80% 6.80% 6.80% 6.80% 6.80% 6.80%  
Investment, Identifier [Axis]: Sequa Corp, Fair Value Hierarchy, Senior Secured Loans—First Lien, Capital Goods -1                              
Variable Rate [32],[36],[39]               6.75% 6.75% 6.75% 6.75% 6.75% 6.75% 6.75%  
PIK Rate [32],[36],[39]               0.00% 0.00% 0.00% 0.00% 0.00% 0.00% 0.00%  
Floor Rate [32],[36],[39]               1.00% 1.00% 1.00% 1.00% 1.00% 1.00% 1.00%  
Principal Amount [6],[32],[36],[39]               $ 16.0              
Amortized Cost [32],[36],[39]               15.4              
Fair Value [2],[32],[36],[39]               $ 16.2              
Investment, Identifier [Axis]: Sequa Corp, Fair Value Hierarchy, Senior Secured Loans—First Lien, Capital Goods -1 | Maximum                              
PIK Rate [32],[36],[39]               1.00% 1.00% 1.00% 1.00% 1.00% 1.00% 1.00%  
Investment, Identifier [Axis]: Sequa Corp, Fair Value Hierarchy, Senior Secured Loans—First Lien, Capital Goods -2                              
Variable Rate [32]               9.00% 9.00% 9.00% 9.00% 9.00% 9.00% 9.00%  
PIK Rate [32]               0.00% 0.00% 0.00% 0.00% 0.00% 0.00% 0.00%  
Floor Rate [32]               1.00% 1.00% 1.00% 1.00% 1.00% 1.00% 1.00%  
Principal Amount [6],[32]               $ 16.4              
Amortized Cost [32]               16.0              
Fair Value [2],[32]               $ 17.2              
Investment, Identifier [Axis]: Sequa Corp, Fair Value Hierarchy, Senior Secured Loans—First Lien, Capital Goods -2 | Maximum                              
PIK Rate [32]               9.50% 9.50% 9.50% 9.50% 9.50% 9.50% 9.50%  
Investment, Identifier [Axis]: Sequel Youth & Family Services LLC, Senior Secured Loans—First Lien, Health Care Equipment & Services -1                              
Variable Rate [20],[23],[32]               8.00% 8.00% 8.00% 8.00% 8.00% 8.00% 8.00%  
Floor Rate [20],[23],[32]               1.00% 1.00% 1.00% 1.00% 1.00% 1.00% 1.00%  
Principal Amount [6],[20],[23],[32]               $ 170.0              
Amortized Cost [20],[23],[32]               106.4              
Fair Value [2],[20],[23],[32]               $ 51.6              
Investment, Identifier [Axis]: Sequel Youth & Family Services LLC, Senior Secured Loans—First Lien, Health Care Equipment & Services -2                              
Variable Rate [20],[23],[32]               7.00% 7.00% 7.00% 7.00% 7.00% 7.00% 7.00%  
Floor Rate [20],[23],[32]               1.00% 1.00% 1.00% 1.00% 1.00% 1.00% 1.00%  
Principal Amount [6],[20],[23],[32]               $ 29.2              
Amortized Cost [20],[23],[32]               19.3              
Fair Value [2],[20],[23],[32]               $ 8.9              
Investment, Identifier [Axis]: Sequel Youth & Family Services LLC, Senior Secured Loans—First Lien, Health Care Equipment & Services -3                              
Variable Rate [32]               7.00% 7.00% 7.00% 7.00% 7.00% 7.00% 7.00%  
Floor Rate [32]               1.00% 1.00% 1.00% 1.00% 1.00% 1.00% 1.00%  
Principal Amount [6],[32]               $ 36.0              
Amortized Cost [32]               36.0              
Fair Value [2],[32]               $ 36.0              
Investment, Identifier [Axis]: Sequel Youth & Family Services LLC, Senior Secured Loans—First Lien, Health Care Equipment & Services -4                              
Variable Rate [5]               7.00% 7.00% 7.00% 7.00% 7.00% 7.00% 7.00%  
Floor Rate [5]               1.00% 1.00% 1.00% 1.00% 1.00% 1.00% 1.00%  
Principal Amount [5],[6]               $ 6.0              
Amortized Cost [5]               6.0              
Fair Value [2],[5]               $ 6.0              
Investment, Identifier [Axis]: Sequel Youth & Family Services LLC, Class R Common Stock, Health Care Equipment & Services                              
Number of Shares | shares [28],[51] 900,000 900,000 900,000 900,000 900,000 900,000 900,000                
Amortized Cost [28],[51] $ 0.0                            
Fair Value [1],[28],[51] $ 0.0                            
Investment, Identifier [Axis]: Sequel Youth & Family Services LLC, Health Care Equipment & Services                              
Rate [12],[15],[25],[28] 3.00% 3.00% 3.00% 3.00% 3.00% 3.00% 3.00%                
Principal Amount [15],[17],[25],[28] $ 57.2                            
Amortized Cost [15],[25],[28] 8.9                            
Fair Value [3],[15],[25],[28] $ 0.3                            
Investment, Identifier [Axis]: SitusAMC Holdings Corp                              
Variable Rate [8],[9],[32]               5.75% 5.75% 5.75% 5.75% 5.75% 5.75% 5.75%  
Floor Rate [8],[9],[32]               0.80% 0.80% 0.80% 0.80% 0.80% 0.80% 0.80%  
Principal Amount [6],[8],[9],[32]               $ 95.4              
Amortized Cost [8],[9],[32]               94.5              
Fair Value [2],[8],[9],[32]               $ 94.4              
Investment, Identifier [Axis]: SitusAMC Holdings Corp, Real Estate                              
Variable Rate [12],[13],[14],[15] 5.50% 5.50% 5.50% 5.50% 5.50% 5.50% 5.50%                
Floor Rate [13],[14],[19] 0.80% 0.80% 0.80% 0.80% 0.80% 0.80% 0.80%                
Principal Amount [13],[14],[17],[19] $ 55.2                            
Amortized Cost [13],[14],[19] 54.7                            
Fair Value [3],[13],[14],[19] $ 53.2                            
Investment, Identifier [Axis]: Solera LLC                              
Variable Rate [32],[36]               8.00% 8.00% 8.00% 8.00% 8.00% 8.00% 8.00%  
Floor Rate [32],[36]               1.00% 1.00% 1.00% 1.00% 1.00% 1.00% 1.00%  
Principal Amount [6],[32],[36]               $ 312.4              
Amortized Cost [32],[36]               295.8              
Fair Value [2],[32],[36]               $ 317.6              
Investment, Identifier [Axis]: Solera LLC, Software & Services                              
Variable Rate [12] 8.00% 8.00% 8.00% 8.00% 8.00% 8.00% 8.00%                
Floor Rate [15],[37] 1.00% 1.00% 1.00% 1.00% 1.00% 1.00% 1.00%                
Principal Amount [15],[17],[37] $ 312.4                            
Amortized Cost [15],[37] 297.3                            
Fair Value [3],[15],[37] $ 307.7                            
Investment, Identifier [Axis]: Solina France SASU, Food, Beverage & Tobacco                              
Variable Rate [12] 6.50% 6.50% 6.50% 6.50% 6.50% 6.50% 6.50%                
Floor Rate [15],[29],[40] 0.00% 0.00% 0.00% 0.00% 0.00% 0.00% 0.00%                
Principal Amount [15],[17],[29],[40] $ 40.0                            
Amortized Cost [15],[29],[40] 38.8                            
Fair Value [3],[15],[29],[40] 39.1                            
Investment, Identifier [Axis]: Sorenson Communications LLC                              
Variable Rate [8],[32],[36],[38],[42],[43]               5.50% 5.50% 5.50% 5.50% 5.50% 5.50% 5.50%  
Floor Rate [8],[32],[36],[38],[42],[43]               0.80% 0.80% 0.80% 0.80% 0.80% 0.80% 0.80%  
Principal Amount [6],[8],[32],[36],[38],[42],[43]               $ 59.9              
Amortized Cost [8],[32],[36],[38],[42],[43]               56.9              
Fair Value [61] 0.0             60.1 [2],[8],[32],[36],[38],[42],[43]              
Investment, Identifier [Axis]: Sorenson Communications LLC 1                              
Fair Value [62]               60.1             0.0
Investment, Identifier [Axis]: Sorenson Communications LLC 2                              
Fair Value               0.0             0.0
Investment, Identifier [Axis]: Sorenson Communications LLC, Common Stock                              
Fair Value $ 0.0 [61]             $ 67.5 [61],[62]             0.0 [62]
Investment, Identifier [Axis]: Sorenson Communications LLC, Common Stock, Telecommunication Services                              
Number of Shares | shares 42,731 [15],[28],[53],[54] 42,731 [15],[28],[53],[54] 42,731 [15],[28],[53],[54] 42,731 [15],[28],[53],[54] 42,731 [15],[28],[53],[54] 42,731 [15],[28],[53],[54] 42,731 [15],[28],[53],[54] 89,959 [11],[23],[32],[42],[52] 89,959 [11],[23],[32],[42],[52] 89,959 [11],[23],[32],[42],[52] 89,959 [11],[23],[32],[42],[52] 89,959 [11],[23],[32],[42],[52] 89,959 [11],[23],[32],[42],[52] 89,959 [11],[23],[32],[42],[52]  
Amortized Cost $ 7.1 [15],[28],[53],[54]             $ 42.5 [11],[23],[32],[42],[52]              
Fair Value $ 0.0 [1],[15],[28],[53],[54]             67.5 [2],[11],[23],[32],[42],[52]              
Investment, Identifier [Axis]: Sorenson Communications LLC, Telecommunication Services 1                              
Variable Rate [12],[13],[18],[19],[37] 5.50% 5.50% 5.50% 5.50% 5.50% 5.50% 5.50%                
Floor Rate [13],[18],[19],[37] 0.80% 0.80% 0.80% 0.80% 0.80% 0.80% 0.80%                
Principal Amount [13],[17],[18],[19],[37] $ 33.6                            
Amortized Cost [13],[18],[19],[37] 31.9                            
Fair Value [3],[13],[18],[19],[37] 32.2                            
Investment, Identifier [Axis]: Sorenson Communications LLC, Telecommunication Services 2                              
Principal Amount [15],[17],[28],[53],[54] 9.9                            
Amortized Cost [15],[28],[53],[54] 8.9                            
Fair Value [3],[15],[28],[53],[54] 9.3                            
Investment, Identifier [Axis]: Sorenson Communications LLC, Telecommunication Services 3                              
Principal Amount [15],[17],[28],[53],[54] 40.3                            
Amortized Cost [15],[28],[53],[54] 32.0                            
Fair Value [3],[15],[28],[53],[54] 34.1                            
Investment, Identifier [Axis]: Sound United LLC 1                              
Fair Value               0.0             14.9
Investment, Identifier [Axis]: Sound United LLC 2                              
Fair Value               0.0             20.9
Investment, Identifier [Axis]: Sound United LLC, Class A Units                              
Fair Value               0.0             0.0
Investment, Identifier [Axis]: Sound United LLC, Common Stock                              
Fair Value $ 0.0             $ 77.5             29.3
Investment, Identifier [Axis]: Sound United LLC, Common Stock, Consumer Durables & Apparel                              
Number of Shares | shares 532,768 [15],[28] 532,768 [15],[28] 532,768 [15],[28] 532,768 [15],[28] 532,768 [15],[28] 532,768 [15],[28] 532,768 [15],[28] 12,857,143 [31],[32] 12,857,143 [31],[32] 12,857,143 [31],[32] 12,857,143 [31],[32] 12,857,143 [31],[32] 12,857,143 [31],[32] 12,857,143 [31],[32]  
Amortized Cost $ 0.7 [15],[28]             $ 17.3 [31],[32]              
Fair Value $ 7.0 [1],[15],[28]             77.5 [2],[31],[32]              
Investment, Identifier [Axis]: Sound United LLC, Series I Units                              
Fair Value               0.0             0.0
Investment, Identifier [Axis]: Sound United LLC, Series II Units                              
Fair Value               $ 0.0             0.0
Investment, Identifier [Axis]: Source Code LLC, Senior Secured Loans—First Lien, Software & Services -1                              
Variable Rate [8],[9],[38]               6.50% 6.50% 6.50% 6.50% 6.50% 6.50% 6.50%  
Floor Rate [8],[9],[38]               1.00% 1.00% 1.00% 1.00% 1.00% 1.00% 1.00%  
Principal Amount [6],[8],[9],[38]               $ 53.3              
Amortized Cost [8],[9],[38]               52.3              
Fair Value [2],[8],[9],[38]               $ 52.2              
Investment, Identifier [Axis]: Source Code LLC, Senior Secured Loans—First Lien, Software & Services -2                              
Variable Rate               6.50% 6.50% 6.50% 6.50% 6.50% 6.50% 6.50%  
Floor Rate [5]               1.00% 1.00% 1.00% 1.00% 1.00% 1.00% 1.00%  
Principal Amount [5],[6]               $ 15.3              
Amortized Cost [5]               15.0              
Fair Value [2],[5]               $ 15.0              
Investment, Identifier [Axis]: Source Code LLC, Software & Services 1                              
Variable Rate [12],[13],[14],[19] 6.50% 6.50% 6.50% 6.50% 6.50% 6.50% 6.50%                
Floor Rate [13],[14],[19] 1.00% 1.00% 1.00% 1.00% 1.00% 1.00% 1.00%                
Principal Amount [13],[14],[17],[19] $ 52.8                            
Amortized Cost [13],[14],[19] 51.9                            
Fair Value [3],[13],[14],[19] $ 51.3                            
Investment, Identifier [Axis]: Source Code LLC, Software & Services 2                              
Variable Rate [12] 6.50% 6.50% 6.50% 6.50% 6.50% 6.50% 6.50%                
Floor Rate [4] 1.00% 1.00% 1.00% 1.00% 1.00% 1.00% 1.00%                
Principal Amount [4],[17] $ 15.3                            
Amortized Cost [4] 15.0                            
Fair Value [3],[4] $ 14.8                            
Investment, Identifier [Axis]: Spins LLC, FSK CLO, Senior Secured Loans—First Lien, Software & Services -1                              
Variable Rate [32],[33],[38],[39]               5.50% 5.50% 5.50% 5.50% 5.50% 5.50% 5.50%  
Floor Rate [32],[33],[38],[39]               1.00% 1.00% 1.00% 1.00% 1.00% 1.00% 1.00%  
Principal Amount [6],[32],[33],[38],[39]               $ 60.7              
Amortized Cost [32],[33],[38],[39]               57.3              
Fair Value [2],[32],[33],[38],[39]               $ 61.3              
Investment, Identifier [Axis]: Spins LLC, FSK CLO, Senior Secured Loans—First Lien, Software & Services -2                              
Variable Rate [5]               5.50% 5.50% 5.50% 5.50% 5.50% 5.50% 5.50%  
Floor Rate [5]               1.00% 1.00% 1.00% 1.00% 1.00% 1.00% 1.00%  
Principal Amount [5],[6]               $ 7.9              
Amortized Cost [5]               7.9              
Fair Value [2],[5]               $ 7.9              
Investment, Identifier [Axis]: Spins LLC, Software & Services 1                              
Variable Rate [12] 5.50% 5.50% 5.50% 5.50% 5.50% 5.50% 5.50%                
Floor Rate [15],[19],[34],[40] 1.00% 1.00% 1.00% 1.00% 1.00% 1.00% 1.00%                
Principal Amount [15],[17],[19],[34],[40] $ 68.2                            
Amortized Cost [15],[19],[34],[40] 65.4                            
Fair Value [3],[15],[19],[34],[40] $ 68.2                            
Investment, Identifier [Axis]: Spins LLC, Software & Services 2                              
Variable Rate [12] 5.50% 5.50% 5.50% 5.50% 5.50% 5.50% 5.50%                
Floor Rate [4] 1.00% 1.00% 1.00% 1.00% 1.00% 1.00% 1.00%                
Principal Amount [4],[17] $ 16.5                            
Amortized Cost [4] 16.5                            
Fair Value [3],[4] $ 16.5                            
Investment, Identifier [Axis]: Spins LLC, Software & Services 3                              
Variable Rate [12] 5.50% 5.50% 5.50% 5.50% 5.50% 5.50% 5.50%                
Floor Rate [4] 1.00% 1.00% 1.00% 1.00% 1.00% 1.00% 1.00%                
Principal Amount [4],[17] $ 7.9                            
Amortized Cost [4] 7.9                            
Fair Value [3],[4] $ 7.9                            
Investment, Identifier [Axis]: Staples Canada                              
Variable Rate [24],[32]               7.00% 7.00% 7.00% 7.00% 7.00% 7.00% 7.00%  
Floor Rate [24],[32]               1.00% 1.00% 1.00% 1.00% 1.00% 1.00% 1.00%  
Principal Amount [6],[24],[32]                           $ 35.8  
Amortized Cost [24],[32]               $ 28.0              
Fair Value [2],[24],[32]               $ 29.1              
Investment, Identifier [Axis]: Staples Canada, Retailing                              
Variable Rate [12] 7.00% 7.00% 7.00% 7.00% 7.00% 7.00% 7.00%                
Floor Rate [15],[29] 1.00% 1.00% 1.00% 1.00% 1.00% 1.00% 1.00%                
Principal Amount [15],[17],[29]             $ 30.5                
Amortized Cost [15],[29] $ 23.9                            
Fair Value [3],[15],[29] $ 22.9                            
Investment, Identifier [Axis]: Star Mountain Diversified Credit Income Fund III, LP, Private Equity, Diversified Financials                              
Number of Shares | shares 23,500,000 [29],[55] 23,500,000 [29],[55] 23,500,000 [29],[55] 23,500,000 [29],[55] 23,500,000 [29],[55] 23,500,000 [29],[55] 23,500,000 [29],[55] 23,500,000 [6],[24],[56] 23,500,000 [6],[24],[56] 23,500,000 [6],[24],[56] 23,500,000 [6],[24],[56] 23,500,000 [6],[24],[56] 23,500,000 [6],[24],[56] 23,500,000 [6],[24],[56]  
Amortized Cost $ 23.5 [29],[55]             $ 23.5 [24],[56]              
Fair Value $ 23.8 [3],[29],[55]             24.3 [2],[24],[56]              
Investment, Identifier [Axis]: Strategic Credit Opportunities Partners, LLC 2                              
Fair Value               $ 1,396.2             712.5
Investment, Identifier [Axis]: Stuart Weitzman Inc, Common Stock, Consumer Durables & Apparel                              
Number of Shares | shares 5,451 [15],[28] 5,451 [15],[28] 5,451 [15],[28] 5,451 [15],[28] 5,451 [15],[28] 5,451 [15],[28] 5,451 [15],[28] 5,451 [23],[32] 5,451 [23],[32] 5,451 [23],[32] 5,451 [23],[32] 5,451 [23],[32] 5,451 [23],[32] 5,451 [23],[32]  
Amortized Cost $ 0.0 [15],[28]             $ 0.0 [23],[32]              
Fair Value $ 0.0 [1],[15],[28]             $ 0.0 [2],[23],[32]              
Investment, Identifier [Axis]: Summit Interconnect Inc, Senior Secured Loans—First Lien, Capital Goods-1                              
Variable Rate [8],[9],[32],[38],[43]               6.00% 6.00% 6.00% 6.00% 6.00% 6.00% 6.00%  
Floor Rate [8],[9],[32],[38],[43]               1.00% 1.00% 1.00% 1.00% 1.00% 1.00% 1.00%  
Principal Amount [6],[8],[9],[32],[38],[43]               $ 107.9              
Amortized Cost [8],[9],[32],[38],[43]               106.8              
Fair Value [2],[8],[9],[32],[38],[43]               $ 106.9              
Investment, Identifier [Axis]: Summit Interconnect Inc, Senior Secured Loans—First Lien, Capital Goods-2                              
Variable Rate [5]               6.00% 6.00% 6.00% 6.00% 6.00% 6.00% 6.00%  
Floor Rate [5]               1.00% 1.00% 1.00% 1.00% 1.00% 1.00% 1.00%  
Principal Amount [5],[6]               $ 48.7              
Amortized Cost [5]               48.7              
Fair Value [2],[5]               $ 48.2              
Investment, Identifier [Axis]: Summit Interconnect Inc, Capital Goods 1                              
Variable Rate [12] 6.00% 6.00% 6.00% 6.00% 6.00% 6.00% 6.00%                
Floor Rate [13],[14],[15],[18],[19],[40] 1.00% 1.00% 1.00% 1.00% 1.00% 1.00% 1.00%                
Principal Amount [13],[14],[15],[17],[18],[19],[40] $ 136.5                            
Amortized Cost [13],[14],[15],[18],[19],[40] 135.4                            
Fair Value [3],[13],[14],[15],[18],[19],[40] $ 128.7                            
Investment, Identifier [Axis]: Summit Interconnect Inc, Capital Goods 2                              
Variable Rate [12] 6.00% 6.00% 6.00% 6.00% 6.00% 6.00% 6.00%                
Floor Rate [4] 1.00% 1.00% 1.00% 1.00% 1.00% 1.00% 1.00%                
Principal Amount [4],[17] $ 9.4                            
Amortized Cost [4] 9.4                            
Fair Value [3],[4] 8.9                            
Investment, Identifier [Axis]: Sungard Availability Services Capital Inc                              
Variable Rate [20],[23],[32],[42]               4.00% 4.00% 4.00% 4.00% 4.00% 4.00% 4.00%  
PIK Rate [20],[23],[32],[42]               2.80% 2.80% 2.80% 2.80% 2.80% 2.80% 2.80%  
Floor Rate [20],[23],[32],[42]               1.00% 1.00% 1.00% 1.00% 1.00% 1.00% 1.00%  
Principal Amount [6],[20],[23],[32],[42]               $ 14.6              
Amortized Cost [20],[23],[32],[42]               13.7              
Fair Value [2],[20],[23],[32],[42]               $ 8.3              
Investment, Identifier [Axis]: Sungard Availability Services Capital Inc | Maximum                              
PIK Rate [20],[23],[32],[42]               2.80% 2.80% 2.80% 2.80% 2.80% 2.80% 2.80%  
Investment, Identifier [Axis]: Sungard Availability Services Capital Inc 1                              
Fair Value [61] 0.5             $ 6.0              
Investment, Identifier [Axis]: Sungard Availability Services Capital Inc 2                              
Fair Value 0.0 [61]             8.3 [61]             0.0
Investment, Identifier [Axis]: Sungard Availability Services Capital Inc 3                              
Fair Value [62]               6.0             0.0
Investment, Identifier [Axis]: Sungard Availability Services Capital Inc 4                              
Fair Value [61] $ 2.0             $ 0.0              
Investment, Identifier [Axis]: Sungard Availability Services Capital Inc, Senior Secured Loans, First Lien                              
Variable Rate [32],[42]               3.75% 3.75% 3.75% 3.75% 3.75% 3.75% 3.75%  
PIK Rate [32],[42]               3.80% 3.80% 3.80% 3.80% 3.80% 3.80% 3.80%  
Floor Rate [32],[42]               1.00% 1.00% 1.00% 1.00% 1.00% 1.00% 1.00%  
Principal Amount [6],[32],[42]               $ 5.8              
Amortized Cost [32],[42]               5.7              
Fair Value [2],[32],[42]               $ 6.0              
Investment, Identifier [Axis]: Sungard Availability Services Capital Inc, Senior Secured Loans, First Lien | Maximum                              
PIK Rate [32],[42]               3.80% 3.80% 3.80% 3.80% 3.80% 3.80% 3.80%  
Investment, Identifier [Axis]: Sungard Availability Services Capital Inc, Common Stock                              
Fair Value [62]               $ 0.0             0.0
Investment, Identifier [Axis]: Sungard Availability Services Capital Inc, Common Stock, Software & Services                              
Number of Shares | shares [23],[32],[33],[42],[52]               262,516 262,516 262,516 262,516 262,516 262,516 262,516  
Amortized Cost [23],[32],[33],[42],[52]               $ 6.9              
Fair Value [2],[23],[32],[33],[42],[52]               0.0              
Investment, Identifier [Axis]: Sungard Availability Services Capital Inc, Software & Services 1                              
Variable Rate [12] 1.00% 1.00% 1.00% 1.00% 1.00% 1.00% 1.00%                
PIK Rate [12] 8.50% 8.50% 8.50% 8.50% 8.50% 8.50% 8.50%                
Floor Rate [15],[41] 0.00% 0.00% 0.00% 0.00% 0.00% 0.00% 0.00%                
Principal Amount [15],[17],[41] $ 2.0                            
Amortized Cost [15],[41] 2.0                            
Fair Value [3],[15],[41] $ 2.0                            
Investment, Identifier [Axis]: Sungard Availability Services Capital Inc, Software & Services 1 | Maximum                              
PIK Rate [12] 8.50% 8.50% 8.50% 8.50% 8.50% 8.50% 8.50%                
Investment, Identifier [Axis]: Sungard Availability Services Capital Inc, Software & Services 2                              
Variable Rate [12] 3.75% 3.75% 3.75% 3.75% 3.75% 3.75% 3.75%                
PIK Rate [12] 3.80% 3.80% 3.80% 3.80% 3.80% 3.80% 3.80%                
Floor Rate [15],[25],[28],[41] 1.00% 1.00% 1.00% 1.00% 1.00% 1.00% 1.00%                
Principal Amount [15],[17],[25],[28],[41] $ 6.1                            
Amortized Cost [15],[25],[28],[41] 5.8                            
Fair Value [3],[15],[25],[28],[41] $ 0.5                            
Investment, Identifier [Axis]: Sungard Availability Services Capital Inc, Software & Services 3                              
Variable Rate [12] 1.00% 1.00% 1.00% 1.00% 1.00% 1.00% 1.00%                
PIK Rate [12] 8.50% 8.50% 8.50% 8.50% 8.50% 8.50% 8.50%                
Floor Rate [4],[41] 0.00% 0.00% 0.00% 0.00% 0.00% 0.00% 0.00%                
Principal Amount [4],[17],[41] $ 1.2                            
Amortized Cost [4],[41] 1.2                            
Fair Value [3],[4],[41] $ 1.2                            
Investment, Identifier [Axis]: Sungard Availability Services Capital Inc, Software & Services 4                              
Variable Rate [12] 4.00% 4.00% 4.00% 4.00% 4.00% 4.00% 4.00%                
PIK Rate [12] 2.80% 2.80% 2.80% 2.80% 2.80% 2.80% 2.80%                
Floor Rate [15],[25],[28],[41] 1.00% 1.00% 1.00% 1.00% 1.00% 1.00% 1.00%                
Principal Amount [15],[17],[25],[28],[41] $ 15.1                            
Amortized Cost [15],[25],[28],[41] 13.5                            
Fair Value [3],[15],[25],[28],[41] $ 0.0                            
Investment, Identifier [Axis]: Sungard Availability Services Capital Inc, Software & Services 4 | Maximum                              
PIK Rate [12] 2.80% 2.80% 2.80% 2.80% 2.80% 2.80% 2.80%                
Investment, Identifier [Axis]: Sungard Availbaility Services Capital Inc, Common Stock                              
Fair Value $ 0.0             $ 0.0              
Investment, Identifier [Axis]: Sweeping Corp of America Inc, Commercial & Professional Services 1                              
Variable Rate [12] 5.75% 5.75% 5.75% 5.75% 5.75% 5.75% 5.75%                
Floor Rate [15],[40] 1.00% 1.00% 1.00% 1.00% 1.00% 1.00% 1.00%                
Principal Amount [15],[17],[40] $ 72.2                            
Amortized Cost [15],[40] 70.2                            
Fair Value [3],[15],[40] $ 72.2                            
Investment, Identifier [Axis]: Sweeping Corp of America Inc, Commercial & Professional Services 2                              
Variable Rate [12] 5.75% 5.75% 5.75% 5.75% 5.75% 5.75% 5.75%                
Floor Rate [15] 1.00% 1.00% 1.00% 1.00% 1.00% 1.00% 1.00%                
Principal Amount [15],[17] $ 1.0                            
Amortized Cost [15] 1.0                            
Fair Value [3],[15] $ 1.0                            
Investment, Identifier [Axis]: Sweeping Corp of America Inc, Commercial & Professional Services 3                              
Variable Rate [12] 5.75% 5.75% 5.75% 5.75% 5.75% 5.75% 5.75%                
Floor Rate [4] 1.00% 1.00% 1.00% 1.00% 1.00% 1.00% 1.00%                
Principal Amount [4],[17] $ 4.7                            
Amortized Cost [4] 4.7                            
Fair Value [3],[4] $ 4.7                            
Investment, Identifier [Axis]: Sweeping Corp of America Inc, Senior Secured Loans—First Lien, Commercial & Professional Services -1                              
Variable Rate [32],[39]               5.75% 5.75% 5.75% 5.75% 5.75% 5.75% 5.75%  
Floor Rate [32],[39]               1.00% 1.00% 1.00% 1.00% 1.00% 1.00% 1.00%  
Principal Amount [6],[32],[39]               $ 55.8              
Amortized Cost [32],[39]               53.3              
Fair Value [2],[32],[39]               $ 56.3              
Investment, Identifier [Axis]: Sweeping Corp of America Inc, Senior Secured Loans—First Lien, Commercial & Professional Services -2                              
Variable Rate [32]               5.75% 5.75% 5.75% 5.75% 5.75% 5.75% 5.75%  
Floor Rate [32]               1.00% 1.00% 1.00% 1.00% 1.00% 1.00% 1.00%  
Principal Amount [6],[32]               $ 1.8              
Amortized Cost [32]               1.8              
Fair Value [2],[32]               $ 1.8              
Investment, Identifier [Axis]: Sweeping Corp of America Inc, Senior Secured Loans—First Lien, Commercial & Professional Services -3                              
Variable Rate [5]               5.75% 5.75% 5.75% 5.75% 5.75% 5.75% 5.75%  
Floor Rate [5]               1.00% 1.00% 1.00% 1.00% 1.00% 1.00% 1.00%  
Principal Amount [5],[6]               $ 17.2              
Amortized Cost [5]               17.2              
Fair Value [2],[5]               $ 17.3              
Investment, Identifier [Axis]: Sweeping Corp of America Inc, Senior Secured Loans—First Lien, Commercial & Professional Services -4                              
Variable Rate [5]               5.75% 5.75% 5.75% 5.75% 5.75% 5.75% 5.75%  
Floor Rate [5]               1.00% 1.00% 1.00% 1.00% 1.00% 1.00% 1.00%  
Principal Amount [5],[6]               $ 3.9              
Amortized Cost [5]               3.9              
Fair Value [2],[5]               $ 3.9              
Investment, Identifier [Axis]: Swift Worldwide Resources Holdco Ltd, Common Stock, Energy                              
Number of Shares | shares 1,250,000 [15],[28] 1,250,000 [15],[28] 1,250,000 [15],[28] 1,250,000 [15],[28] 1,250,000 [15],[28] 1,250,000 [15],[28] 1,250,000 [15],[28] 1,250,000 [23],[32] 1,250,000 [23],[32] 1,250,000 [23],[32] 1,250,000 [23],[32] 1,250,000 [23],[32] 1,250,000 [23],[32] 1,250,000 [23],[32]  
Amortized Cost $ 1.2 [15],[28]             $ 1.2 [23],[32]              
Fair Value $ 1.0 [1],[15],[28]             $ 1.1 [2],[23],[32]              
Investment, Identifier [Axis]: TIBCO Software Inc, Preferred Stock, Software & Services                              
PIK Rate [12],[15] 12.00% 12.00% 12.00% 12.00% 12.00% 12.00% 12.00%                
Floor Rate [15] 0.50% 0.50% 0.50% 0.50% 0.50% 0.50% 0.50%                
Number of Shares | shares [15] 133,186,150 133,186,150 133,186,150 133,186,150 133,186,150 133,186,150 133,186,150                
Amortized Cost [15] $ 127.3                            
Fair Value [1],[15] $ 129.6                            
Investment, Identifier [Axis]: TIBCO Software Inc, Preferred Stock, Software & Services | Maximum                              
PIK Rate [12],[15] 12.00% 12.00% 12.00% 12.00% 12.00% 12.00% 12.00%                
Investment, Identifier [Axis]: TIBCO Software Inc, Software & Services 1                              
Variable Rate [12] 4.50% 4.50% 4.50% 4.50% 4.50% 4.50% 4.50%                
Floor Rate [15],[37] 0.50% 0.50% 0.50% 0.50% 0.50% 0.50% 0.50%                
Principal Amount [15],[17],[37] $ 39.9                            
Amortized Cost [15],[37] 36.4                            
Fair Value [3],[15],[37] $ 35.7                            
Investment, Identifier [Axis]: TIBCO Software Inc, Software & Services 2                              
Rate [12] 6.50% 6.50% 6.50% 6.50% 6.50% 6.50% 6.50%                
Principal Amount [15],[17],[37] $ 1.0                            
Amortized Cost [15],[37] 0.8                            
Fair Value [3],[15],[37] $ 0.8                            
Investment, Identifier [Axis]: Tangoe LLC                              
Variable Rate [10],[32],[33],[39],[43]               6.50% 6.50% 6.50% 6.50% 6.50% 6.50% 6.50%  
Floor Rate [10],[32],[33],[39],[43]               1.00% 1.00% 1.00% 1.00% 1.00% 1.00% 1.00%  
Principal Amount [6],[10],[32],[33],[39],[43]               $ 190.2              
Amortized Cost [10],[32],[33],[39],[43]               171.5              
Fair Value [2],[10],[32],[33],[39],[43]               $ 147.2              
Investment, Identifier [Axis]: Tangoe LLC, Software & Services 1                              
Variable Rate [12] 6.50% 6.50% 6.50% 6.50% 6.50% 6.50% 6.50%                
Floor Rate [15],[34],[40] 1.00% 1.00% 1.00% 1.00% 1.00% 1.00% 1.00%                
Principal Amount [15],[17],[34],[40] $ 179.5                            
Amortized Cost [15],[34],[40] 165.3                            
Fair Value [3],[15],[34],[40] $ 147.2                            
Investment, Identifier [Axis]: Tangoe LLC, Software & Services 2                              
PIK Rate [12] 12.50% 12.50% 12.50% 12.50% 12.50% 12.50% 12.50%                
Principal Amount [15],[17],[34],[40] $ 3.3                            
Amortized Cost [15],[34],[40] 3.3                            
Fair Value [3],[15],[34],[40] $ 2.6                            
Investment, Identifier [Axis]: Tangoe LLC, Software & Services 2 | Maximum                              
PIK Rate [12] 12.50% 12.50% 12.50% 12.50% 12.50% 12.50% 12.50%                
Investment, Identifier [Axis]: TeamSystem SpA, Software & Services                              
Variable Rate [12] 6.25% 6.25% 6.25% 6.25% 6.25% 6.25% 6.25%                
Floor Rate [15],[29] 0.00% 0.00% 0.00% 0.00% 0.00% 0.00% 0.00%                
Principal Amount | € [15],[17],[29]       € 19.8                      
Amortized Cost [15],[29] $ 18.9                            
Fair Value [3],[15],[29] 21.4                            
Investment, Identifier [Axis]: Tekfor HoldCo (formerly Amtek Global Technology Pte Ltd), Automobiles & Components                              
Principal Amount | € [15],[17],[28],[29],[30]       € 36.7                      
Amortized Cost [15],[28],[29],[30] 40.1                            
Fair Value [3],[15],[28],[29],[30] 3.9                            
Investment, Identifier [Axis]: ThermaSys Corp                              
PIK Rate [20],[23],[32],[42]               11.00% 11.00% 11.00% 11.00% 11.00% 11.00% 11.00%  
Floor Rate [20],[23],[32],[42]               1.00% 1.00% 1.00% 1.00% 1.00% 1.00% 1.00%  
Principal Amount [6],[20],[23],[32],[42]               $ 8.5              
Amortized Cost [20],[23],[32],[42]               8.3              
Fair Value $ 8.6             $ 3.5 [2],[20],[23],[32],[42]             3.9
Investment, Identifier [Axis]: ThermaSys Corp | Maximum                              
PIK Rate [20],[23],[32],[42]               11.00% 11.00% 11.00% 11.00% 11.00% 11.00% 11.00%  
Investment, Identifier [Axis]: ThermaSys Corp, Capital Goods                              
PIK Rate [12] 11.00% 11.00% 11.00% 11.00% 11.00% 11.00% 11.00%                
Floor Rate [15],[25],[28],[41] 1.00% 1.00% 1.00% 1.00% 1.00% 1.00% 1.00%                
Principal Amount [15],[17],[25],[28],[41] $ 9.7                            
Amortized Cost [15],[25],[28],[41] 8.3                            
Fair Value [3],[15],[25],[28],[41] $ 8.6                            
Investment, Identifier [Axis]: ThermaSys Corp, Capital Goods | Maximum                              
PIK Rate [12] 11.00% 11.00% 11.00% 11.00% 11.00% 11.00% 11.00%                
Investment, Identifier [Axis]: ThermaSys Corp, Common Stock                              
Fair Value $ 0.0             $ 0.0             0.0
Investment, Identifier [Axis]: ThermaSys Corp, Common Stock, Capital Goods                              
Number of Shares | shares 17,383,026 [15],[28],[41],[53] 17,383,026 [15],[28],[41],[53] 17,383,026 [15],[28],[41],[53] 17,383,026 [15],[28],[41],[53] 17,383,026 [15],[28],[41],[53] 17,383,026 [15],[28],[41],[53] 17,383,026 [15],[28],[41],[53] 17,383,026 [23],[32],[42],[52] 17,383,026 [23],[32],[42],[52] 17,383,026 [23],[32],[42],[52] 17,383,026 [23],[32],[42],[52] 17,383,026 [23],[32],[42],[52] 17,383,026 [23],[32],[42],[52] 17,383,026 [23],[32],[42],[52]  
Amortized Cost $ 10.2 [15],[28],[41],[53]             $ 10.2 [23],[32],[42],[52]              
Fair Value 0.0 [1],[15],[28],[41],[53]             0.0 [2],[23],[32],[42],[52]              
Investment, Identifier [Axis]: ThermaSys Corp, Preferred Stock                              
Fair Value $ 0.0             $ 0.0             0.0
Investment, Identifier [Axis]: ThermaSys Corp, Preferred Stock, Capital Goods                              
Number of Shares | shares 1,529 [15],[28],[41] 1,529 [15],[28],[41] 1,529 [15],[28],[41] 1,529 [15],[28],[41] 1,529 [15],[28],[41] 1,529 [15],[28],[41] 1,529 [15],[28],[41] 1,529 [23],[32],[42] 1,529 [23],[32],[42] 1,529 [23],[32],[42] 1,529 [23],[32],[42] 1,529 [23],[32],[42] 1,529 [23],[32],[42] 1,529 [23],[32],[42]  
Amortized Cost $ 1.7 [15],[28],[41]             $ 1.7 [23],[32],[42]              
Fair Value $ 0.0 [1],[15],[28],[41]             $ 0.0 [2],[23],[32],[42]              
Investment, Identifier [Axis]: ThreeSixty Group, Retailing 1                              
Variable Rate [12] 5.00% 5.00% 5.00% 5.00% 5.00% 5.00% 5.00%                
PIK Rate [12] 2.50% 2.50% 2.50% 2.50% 2.50% 2.50% 2.50%                
Floor Rate [15],[18],[40] 1.50% 1.50% 1.50% 1.50% 1.50% 1.50% 1.50%                
Principal Amount [15],[17],[18],[40] $ 46.1                            
Amortized Cost [15],[18],[40] 46.1                            
Fair Value [3],[15],[18],[40] $ 45.1                            
Investment, Identifier [Axis]: ThreeSixty Group, Retailing 1 | Maximum                              
PIK Rate [12] 2.50% 2.50% 2.50% 2.50% 2.50% 2.50% 2.50%                
Investment, Identifier [Axis]: ThreeSixty Group, Retailing 2                              
Variable Rate [12] 5.00% 5.00% 5.00% 5.00% 5.00% 5.00% 5.00%                
PIK Rate [12] 2.50% 2.50% 2.50% 2.50% 2.50% 2.50% 2.50%                
Floor Rate [15],[40] 1.50% 1.50% 1.50% 1.50% 1.50% 1.50% 1.50%                
Principal Amount [15],[17],[40] $ 45.9                            
Amortized Cost [15],[40] 45.9                            
Fair Value [3],[15],[40] $ 44.8                            
Investment, Identifier [Axis]: ThreeSixty Group, Retailing 2 | Maximum                              
PIK Rate [12] 2.50% 2.50% 2.50% 2.50% 2.50% 2.50% 2.50%                
Investment, Identifier [Axis]: ThreeSixty Group, Senior Secured Loans—First Lien, Retailing -1                              
Variable Rate [32],[39]               5.00% 5.00% 5.00% 5.00% 5.00% 5.00% 5.00%  
PIK Rate [32],[39]               2.50% 2.50% 2.50% 2.50% 2.50% 2.50% 2.50%  
Floor Rate [32],[39]               1.50% 1.50% 1.50% 1.50% 1.50% 1.50% 1.50%  
Principal Amount [6],[32],[39]               $ 48.5              
Amortized Cost [32],[39]               48.4              
Fair Value [2],[32],[39]               $ 47.7              
Investment, Identifier [Axis]: ThreeSixty Group, Senior Secured Loans—First Lien, Retailing -1 | Maximum                              
PIK Rate [32],[39]               2.50% 2.50% 2.50% 2.50% 2.50% 2.50% 2.50%  
Investment, Identifier [Axis]: ThreeSixty Group, Senior Secured Loans—First Lien, Retailing -2                              
Variable Rate [32],[39]               5.00% 5.00% 5.00% 5.00% 5.00% 5.00% 5.00%  
PIK Rate [32],[39]               2.50% 2.50% 2.50% 2.50% 2.50% 2.50% 2.50%  
Floor Rate [32],[39]               1.50% 1.50% 1.50% 1.50% 1.50% 1.50% 1.50%  
Principal Amount [6],[32],[39]               $ 48.3              
Amortized Cost [32],[39]               48.1              
Fair Value [2],[32],[39]               $ 47.4              
Investment, Identifier [Axis]: ThreeSixty Group, Senior Secured Loans—First Lien, Retailing -2 | Maximum                              
PIK Rate [32],[39]               2.50% 2.50% 2.50% 2.50% 2.50% 2.50% 2.50%  
Investment, Identifier [Axis]: Time Manufacturing Co, Capital Goods 1                              
Variable Rate [12] 6.50% 6.50% 6.50% 6.50% 6.50% 6.50% 6.50%                
Floor Rate [15] 0.80% 0.80% 0.80% 0.80% 0.80% 0.80% 0.80%                
Principal Amount [15],[17] $ 45.4                            
Amortized Cost [15] 44.5                            
Fair Value [3],[15] $ 42.7                            
Investment, Identifier [Axis]: Time Manufacturing Co, Capital Goods 2                              
Variable Rate [12] 6.50% 6.50% 6.50% 6.50% 6.50% 6.50% 6.50%                
Floor Rate [15] 0.80% 0.80% 0.80% 0.80% 0.80% 0.80% 0.80%                
Principal Amount [15],[17] $ 7.3                            
Amortized Cost [15] 7.3                            
Fair Value [3],[15] $ 6.9                            
Investment, Identifier [Axis]: Time Manufacturing Co, Capital Goods 3                              
Variable Rate [12] 6.50% 6.50% 6.50% 6.50% 6.50% 6.50% 6.50%                
Floor Rate [15] 0.80% 0.80% 0.80% 0.80% 0.80% 0.80% 0.80%                
Principal Amount | € [15],[17]       € 13.7                      
Amortized Cost [15] $ 14.4                            
Fair Value [3],[15] $ 13.8                            
Investment, Identifier [Axis]: Time Manufacturing Co, Capital Goods 4                              
Variable Rate [12] 6.50% 6.50% 6.50% 6.50% 6.50% 6.50% 6.50%                
Floor Rate [4] 0.80% 0.80% 0.80% 0.80% 0.80% 0.80% 0.80%                
Principal Amount [4],[17] $ 14.8                            
Amortized Cost [4] 14.8                            
Fair Value [3],[4] 13.9                            
Investment, Identifier [Axis]: Time Manufacturing Co, Senior Secured Loans—First Lien, Capital Goods - 5                              
Variable Rate [5]               6.50% 6.50% 6.50% 6.50% 6.50% 6.50% 6.50%  
Floor Rate [5]               0.80% 0.80% 0.80% 0.80% 0.80% 0.80% 0.80%  
Principal Amount | € [5],[6]                     € 15.0        
Amortized Cost [5]               $ 17.0              
Fair Value [2],[5]               $ 17.2              
Investment, Identifier [Axis]: Time Manufacturing Co, Senior Secured Loans—First Lien, Capital Goods -1                              
Variable Rate [32]               6.50% 6.50% 6.50% 6.50% 6.50% 6.50% 6.50%  
Floor Rate [32]               0.80% 0.80% 0.80% 0.80% 0.80% 0.80% 0.80%  
Principal Amount [6],[32]               $ 45.8              
Amortized Cost [32]               44.8              
Fair Value [2],[32]               $ 44.8              
Investment, Identifier [Axis]: Time Manufacturing Co, Senior Secured Loans—First Lien, Capital Goods -2                              
Variable Rate [32]               6.50% 6.50% 6.50% 6.50% 6.50% 6.50% 6.50%  
Floor Rate [32]               0.80% 0.80% 0.80% 0.80% 0.80% 0.80% 0.80%  
Principal Amount [6],[32]               $ 5.3              
Amortized Cost [32]               5.3              
Fair Value [2],[32]               $ 5.3              
Investment, Identifier [Axis]: Time Manufacturing Co, Senior Secured Loans—First Lien, Capital Goods -3                              
Variable Rate [5]               6.50% 6.50% 6.50% 6.50% 6.50% 6.50% 6.50%  
Floor Rate [5]               0.80% 0.80% 0.80% 0.80% 0.80% 0.80% 0.80%  
Principal Amount [5],[6]               $ 13.7              
Amortized Cost [5]               13.7              
Fair Value [2],[5]               $ 13.6              
Investment, Identifier [Axis]: Time Manufacturing Co, Senior Secured Loans—First Lien, Capital Goods -4                              
Variable Rate [5]               6.50% 6.50% 6.50% 6.50% 6.50% 6.50% 6.50%  
Floor Rate [5]               0.80% 0.80% 0.80% 0.80% 0.80% 0.80% 0.80%  
Principal Amount [5],[6]               $ 4.5              
Amortized Cost [5]               4.5              
Fair Value [2],[5]               4.5              
Investment, Identifier [Axis]: Toorak Capital Funding LLC, Membership Interest                              
Fair Value $ 0.0             $ 1.7             6.6
Investment, Identifier [Axis]: Toorak Capital Funding LLC, Membership Interest, Real Estate                              
Number of Shares | shares [6],[23],[24],[31],[32]               1,723,140 1,723,140 1,723,140 1,723,140 1,723,140 1,723,140 1,723,140  
Amortized Cost [23],[24],[31],[32]               $ 1.9              
Fair Value [2],[23],[24],[31],[32]               1.7              
Investment, Identifier [Axis]: Toorak Capital LLC, Membership Interest                              
Fair Value               $ 199.3             235.9
Investment, Identifier [Axis]: Toorak Capital Partners LLC, Private Equity, Real Estate                              
Number of Shares | shares [6],[31],[32]               158,139,270 158,139,270 158,139,270 158,139,270 158,139,270 158,139,270 158,139,270  
Amortized Cost [31],[32]               $ 158.1              
Fair Value [2],[31],[32]               199.3              
Investment, Identifier [Axis]: Toorak Capital Partners LLC, Structured Mezzanine                              
Fair Value               $ 22.0             0.0
Investment, Identifier [Axis]: Toorak Capital Partners LLC, Structured Mezzanine, Real Estate 1                              
PIK Rate [7],[31],[32]               6.50% 6.50% 6.50% 6.50% 6.50% 6.50% 6.50%  
Principal Amount [6],[31],[32]               $ 22.0              
Amortized Cost [31],[32]               22.0              
Fair Value [2],[31],[32]               $ 22.0              
Investment, Identifier [Axis]: Toorak Capital Partners LLC, Structured Mezzanine, Real Estate 1 | Maximum                              
PIK Rate [7],[31],[32]               6.50% 6.50% 6.50% 6.50% 6.50% 6.50% 6.50%  
Investment, Identifier [Axis]: Toorak Capital Partners LLC, Structured Mezzanine, Real Estate 2                              
PIK Rate [5],[7],[31]               6.50% 6.50% 6.50% 6.50% 6.50% 6.50% 6.50%  
Principal Amount [5],[6],[31]               $ 8.0              
Amortized Cost [5],[31]               8.0              
Fair Value [2],[5],[31]               $ 8.0              
Investment, Identifier [Axis]: Toorak Capital Partners LLC, Structured Mezzanine, Real Estate 2 | Maximum                              
PIK Rate [5],[7],[31]               6.50% 6.50% 6.50% 6.50% 6.50% 6.50% 6.50%  
Investment, Identifier [Axis]: Transaction Services Group Ltd, Senior Secured Loans—First Lien, Software & Services -1                              
Variable Rate [24],[32]               6.50% 6.50% 6.50% 6.50% 6.50% 6.50% 6.50%  
Floor Rate [24],[32]               0.00% 0.00% 0.00% 0.00% 0.00% 0.00% 0.00%  
Principal Amount [6],[24],[32]               $ 13.9              
Amortized Cost [24],[32]               17.7              
Fair Value [2],[24],[32]               $ 18.3              
Investment, Identifier [Axis]: Transaction Services Group Ltd, Senior Secured Loans—First Lien, Software & Services -2                              
Variable Rate [24],[32]               6.50% 6.50% 6.50% 6.50% 6.50% 6.50% 6.50%  
Floor Rate [24],[32]               0.00% 0.00% 0.00% 0.00% 0.00% 0.00% 0.00%  
Principal Amount | £ [6]                       £ 80.3      
Amortized Cost               $ 55.7              
Fair Value [2]               $ 57.0              
Investment, Identifier [Axis]: Transaction Services Group Ltd, Senior Secured Loans—First Lien, Software & Services -3                              
Variable Rate [24],[32]               6.50% 6.50% 6.50% 6.50% 6.50% 6.50% 6.50%  
Floor Rate [24],[32]               0.00% 0.00% 0.00% 0.00% 0.00% 0.00% 0.00%  
Principal Amount [6],[24],[32]                         $ 126.2    
Amortized Cost [24],[32]               $ 122.2              
Fair Value [2],[24],[32]               $ 123.1              
Investment, Identifier [Axis]: Transaction Services Group Ltd, Software & Services 1                              
Variable Rate [12] 5.50% 5.50% 5.50% 5.50% 5.50% 5.50% 5.50%                
Floor Rate [15],[29] 0.00% 0.00% 0.00% 0.00% 0.00% 0.00% 0.00%                
Principal Amount [15],[17],[29]           $ 48.3                  
Amortized Cost [15],[29] $ 34.2                            
Fair Value [3],[15],[29] $ 32.1                            
Investment, Identifier [Axis]: Transaction Services Group Ltd, Software & Services 2                              
Variable Rate [12] 5.50% 5.50% 5.50% 5.50% 5.50% 5.50% 5.50%                
Floor Rate [15],[18],[29] 0.00% 0.00% 0.00% 0.00% 0.00% 0.00% 0.00%                
Principal Amount [15],[17],[18],[29] $ 126.2                            
Amortized Cost [15],[18],[29] 122.9                            
Fair Value [3],[15],[18],[29] $ 123.5                            
Investment, Identifier [Axis]: TruckPro LLC                              
Rate [32],[36]               11.00% 11.00% 11.00% 11.00% 11.00% 11.00% 11.00%  
Principal Amount [6],[32],[36]               $ 9.2              
Amortized Cost [32],[36]               9.2              
Fair Value [2],[32],[36]               $ 10.0              
Investment, Identifier [Axis]: TruckPro LLC, Capital Goods                              
Rate [12] 11.00% 11.00% 11.00% 11.00% 11.00% 11.00% 11.00%                
Principal Amount [15],[17],[37] $ 9.2                            
Amortized Cost [15],[37] 9.2                            
Fair Value [3],[15],[37] $ 9.1                            
Investment, Identifier [Axis]: Ultra Electronics Holdings PLC, Capital Goods 1                              
Variable Rate [12] 3.75% 3.75% 3.75% 3.75% 3.75% 3.75% 3.75%                
Floor Rate [15],[29],[37] 0.50% 0.50% 0.50% 0.50% 0.50% 0.50% 0.50%                
Principal Amount [15],[17],[29],[37] $ 1.8                            
Amortized Cost [15],[29],[37] 1.8                            
Fair Value [3],[15],[29],[37] $ 1.7                            
Investment, Identifier [Axis]: Ultra Electronics Holdings PLC, Capital Goods 2                              
Variable Rate [12] 3.75% 3.75% 3.75% 3.75% 3.75% 3.75% 3.75%                
Floor Rate [15],[29],[37] 0.00% 0.00% 0.00% 0.00% 0.00% 0.00% 0.00%                
Principal Amount | € [15],[17],[29],[37]       € 1.4                      
Amortized Cost [15],[29],[37] $ 1.6                            
Fair Value [3],[15],[29],[37] $ 1.4                            
Investment, Identifier [Axis]: Ultra Electronics Holdings PLC, Capital Goods 3                              
Variable Rate [12] 7.25% 7.25% 7.25% 7.25% 7.25% 7.25% 7.25%                
Floor Rate [15],[29] 0.50% 0.50% 0.50% 0.50% 0.50% 0.50% 0.50%                
Principal Amount [15],[17],[29] $ 62.9                            
Amortized Cost [15],[29] 61.1                            
Fair Value [3],[15],[29] $ 58.2                            
Investment, Identifier [Axis]: Ultra Electronics Holdings PLC, Capital Goods 4                              
Variable Rate [12] 9.00% 9.00% 9.00% 9.00% 9.00% 9.00% 9.00%                
PIK Rate [12] 0.00% 0.00% 0.00% 0.00% 0.00% 0.00% 0.00%                
Floor Rate [15],[29] 0.50% 0.50% 0.50% 0.50% 0.50% 0.50% 0.50%                
Principal Amount [15],[17],[29] $ 58.2                            
Amortized Cost [15],[29] 56.5                            
Fair Value [3],[15],[29] $ 53.4                            
Investment, Identifier [Axis]: Ultra Electronics Holdings PLC, Capital Goods 4 | Maximum                              
PIK Rate [12] 9.00% 9.00% 9.00% 9.00% 9.00% 9.00% 9.00%                
Investment, Identifier [Axis]: Ultra Electronics Holdings PLC, Private Equity, Capital Goods 1                              
Number of Shares | shares [15],[28],[29] 683,240,044 683,240,044 683,240,044 683,240,044 683,240,044 683,240,044 683,240,044                
Amortized Cost [15],[28],[29] $ 7.2                            
Fair Value [1],[15],[28],[29] $ 6.7                            
Investment, Identifier [Axis]: Ultra Electronics Holdings PLC, Private Equity, Capital Goods 2                              
Number of Shares | shares [15],[28],[29] 1,272,105 1,272,105 1,272,105 1,272,105 1,272,105 1,272,105 1,272,105                
Amortized Cost [15],[28],[29] $ 1.3                            
Fair Value [1],[15],[28],[29] $ 1.2                            
Investment, Identifier [Axis]: Valeo Foods Group Ltd, Food, Beverage & Tobacco 1                              
Variable Rate [12] 7.50% 7.50% 7.50% 7.50% 7.50% 7.50% 7.50%                
Floor Rate [15],[29] 0.00% 0.00% 0.00% 0.00% 0.00% 0.00% 0.00%                
Principal Amount | € [15],[17],[29]       € 3.8                      
Amortized Cost [15],[29] $ 4.0                            
Fair Value [3],[15],[29] $ 3.6                            
Investment, Identifier [Axis]: Valeo Foods Group Ltd, Food, Beverage & Tobacco 2                              
Variable Rate [12] 7.50% 7.50% 7.50% 7.50% 7.50% 7.50% 7.50%                
Floor Rate [4],[29] 0.00% 0.00% 0.00% 0.00% 0.00% 0.00% 0.00%                
Principal Amount | € [4],[17],[29]       € 2.3                      
Amortized Cost [4],[29] $ 3.1                            
Fair Value [3],[4],[29] $ 2.8                            
Investment, Identifier [Axis]: Valeo Foods Group Ltd, Senior Secured Loans—Second Lien, Food, Beverage & Tobacco -1                              
Variable Rate [24],[32]               8.00% 8.00% 8.00% 8.00% 8.00% 8.00% 8.00%  
Floor Rate [24],[32]               0.00% 0.00% 0.00% 0.00% 0.00% 0.00% 0.00%  
Principal Amount | £ [6],[24],[32]                       £ 9.3      
Amortized Cost [24],[32]               $ 12.3              
Fair Value [2],[24],[32]               $ 12.2              
Investment, Identifier [Axis]: Valeo Foods Group Ltd, Senior Secured Loans—Second Lien, Food, Beverage & Tobacco -2                              
Variable Rate [5],[24]               7.50% 7.50% 7.50% 7.50% 7.50% 7.50% 7.50%  
Floor Rate [5],[24]               0.00% 0.00% 0.00% 0.00% 0.00% 0.00% 0.00%  
Principal Amount | € [5],[6],[24]                     € 6.2        
Amortized Cost [5],[24]               $ 7.2              
Fair Value [2],[5],[24]               $ 6.8              
Investment, Identifier [Axis]: Vantage Specialty Chemicals Inc                              
Variable Rate [32],[36]               8.25% 8.25% 8.25% 8.25% 8.25% 8.25% 8.25%  
Floor Rate [32],[36]               1.00% 1.00% 1.00% 1.00% 1.00% 1.00% 1.00%  
Principal Amount [6],[32],[36]               $ 0.8              
Amortized Cost [32],[36]               0.7              
Fair Value [2],[32],[36]               $ 0.7              
Investment, Identifier [Axis]: Vantage Specialty Chemicals Inc, Materials                              
Variable Rate [12] 8.25% 8.25% 8.25% 8.25% 8.25% 8.25% 8.25%                
Floor Rate [15],[37] 1.00% 1.00% 1.00% 1.00% 1.00% 1.00% 1.00%                
Principal Amount [15],[17],[37] $ 0.8                            
Amortized Cost [15],[37] 0.7                            
Fair Value [3],[15],[37] $ 0.7                            
Investment, Identifier [Axis]: Versatile Processing Group Inc, Class A - 2 Units, Materials                              
Number of Shares | shares 3,637,500 [28],[53] 3,637,500 [28],[53] 3,637,500 [28],[53] 3,637,500 [28],[53] 3,637,500 [28],[53] 3,637,500 [28],[53] 3,637,500 [28],[53] 3,637,500 [23],[52] 3,637,500 [23],[52] 3,637,500 [23],[52] 3,637,500 [23],[52] 3,637,500 [23],[52] 3,637,500 [23],[52] 3,637,500 [23],[52]  
Amortized Cost $ 3.6 [28],[53]             $ 3.6 [23],[52]              
Fair Value $ 0.0 [1],[28],[53]             0.0 [2],[23],[52]              
Investment, Identifier [Axis]: Version1 Software Ltd, Software & Services                              
Variable Rate [12] 5.75% 5.75% 5.75% 5.75% 5.75% 5.75% 5.75%                
PIK Rate [12] 0.00% 0.00% 0.00% 0.00% 0.00% 0.00% 0.00%                
Floor Rate [4],[29] 0.00% 0.00% 0.00% 0.00% 0.00% 0.00% 0.00%                
Principal Amount | € [4],[17],[29]       € 2.4                      
Amortized Cost [4],[29] $ 2.4                            
Fair Value [3],[4],[29] $ 2.3                            
Investment, Identifier [Axis]: Version1 Software Ltd, Software & Services | Maximum                              
PIK Rate [12] 1.70% 1.70% 1.70% 1.70% 1.70% 1.70% 1.70%                
Investment, Identifier [Axis]: VetCor Professional Practices LLC, Health Care Equipment & Services 1                              
Variable Rate [12] 5.75% 5.75% 5.75% 5.75% 5.75% 5.75% 5.75%                
Floor Rate [15] 0.80% 0.80% 0.80% 0.80% 0.80% 0.80% 0.80%                
Principal Amount [15],[17] $ 82.3                            
Amortized Cost [15] 81.5                            
Fair Value [3],[15] $ 80.9                            
Investment, Identifier [Axis]: VetCor Professional Practices LLC, Health Care Equipment & Services 2                              
Variable Rate [12] 5.75% 5.75% 5.75% 5.75% 5.75% 5.75% 5.75%                
Floor Rate [15] 0.80% 0.80% 0.80% 0.80% 0.80% 0.80% 0.80%                
Principal Amount [15],[17] $ 1.8                            
Amortized Cost [15] 1.7                            
Fair Value [3],[15] $ 1.8                            
Investment, Identifier [Axis]: VetCor Professional Practices LLC, Health Care Equipment & Services 3                              
Variable Rate [12] 5.75% 5.75% 5.75% 5.75% 5.75% 5.75% 5.75%                
Floor Rate [4] 0.80% 0.80% 0.80% 0.80% 0.80% 0.80% 0.80%                
Principal Amount [4],[17] $ 11.0                            
Amortized Cost [4] 10.9                            
Fair Value [3],[4] $ 10.8                            
Investment, Identifier [Axis]: VetCor Professional Practices LLC, Health Care Equipment & Services 4                              
Variable Rate [12] 5.75% 5.75% 5.75% 5.75% 5.75% 5.75% 5.75%                
Floor Rate [4] 0.80% 0.80% 0.80% 0.80% 0.80% 0.80% 0.80%                
Principal Amount [4],[17] $ 4.9                            
Amortized Cost [4] 4.9                            
Fair Value [3],[4] 4.8                            
Investment, Identifier [Axis]: Warren Resources Inc                              
Fair Value 18.6             $ 18.7 [57]             0.0 [57]
Investment, Identifier [Axis]: Warren Resources Inc 1                              
Variable Rate [31],[32]               9.00% 9.00% 9.00% 9.00% 9.00% 9.00% 9.00%  
PIK Rate [31],[32]               1.00% 1.00% 1.00% 1.00% 1.00% 1.00% 1.00%  
Floor Rate [31],[32]               1.00% 1.00% 1.00% 1.00% 1.00% 1.00% 1.00%  
Principal Amount [6],[31],[32]               $ 18.7              
Amortized Cost [31],[32]               17.4              
Fair Value [2],[31],[32]               18.7              
Investment, Identifier [Axis]: Warren Resources Inc, Common Stock                              
Fair Value $ 29.2             $ 20.4             $ 0.0
Investment, Identifier [Axis]: Warren Resources Inc, Common Stock, Energy                              
Number of Shares | shares 3,483,788 [15],[28],[30] 3,483,788 [15],[28],[30] 3,483,788 [15],[28],[30] 3,483,788 [15],[28],[30] 3,483,788 [15],[28],[30] 3,483,788 [15],[28],[30] 3,483,788 [15],[28],[30] 3,483,788 [23],[31],[32] 3,483,788 [23],[31],[32] 3,483,788 [23],[31],[32] 3,483,788 [23],[31],[32] 3,483,788 [23],[31],[32] 3,483,788 [23],[31],[32] 3,483,788 [23],[31],[32]  
Amortized Cost $ 12.8 [15],[28],[30]             $ 12.8 [23],[31],[32]              
Fair Value $ 29.2 [1],[15],[28],[30]             $ 20.4 [2],[23],[31],[32]              
Investment, Identifier [Axis]: Warren Resources Inc, Energy                              
Variable Rate [12] 9.00% 9.00% 9.00% 9.00% 9.00% 9.00% 9.00%                
PIK Rate [12] 1.00% 1.00% 1.00% 1.00% 1.00% 1.00% 1.00%                
Floor Rate [15],[30] 1.00% 1.00% 1.00% 1.00% 1.00% 1.00% 1.00%                
Principal Amount [15],[17],[30] $ 18.6                            
Amortized Cost [15],[30] 17.8                            
Fair Value [3],[15],[30] $ 18.6                            
Investment, Identifier [Axis]: Warren Resources Inc, Energy | Maximum                              
PIK Rate [12] 1.00% 1.00% 1.00% 1.00% 1.00% 1.00% 1.00%                
Investment, Identifier [Axis]: Wealth Enhancement Group LLC, Diversified Financials 1                              
Variable Rate [12] 6.00% 6.00% 6.00% 6.00% 6.00% 6.00% 6.00%                
Floor Rate [15],[29] 1.00% 1.00% 1.00% 1.00% 1.00% 1.00% 1.00%                
Principal Amount [15],[17],[29] $ 31.1                            
Amortized Cost [15],[29] 31.0                            
Fair Value [3],[15],[29] $ 30.7                            
Investment, Identifier [Axis]: Wealth Enhancement Group LLC, Diversified Financials 2                              
Variable Rate [12] 6.00% 6.00% 6.00% 6.00% 6.00% 6.00% 6.00%                
Floor Rate [4],[29] 1.00% 1.00% 1.00% 1.00% 1.00% 1.00% 1.00%                
Principal Amount [4],[17],[29] $ 3.3                            
Amortized Cost [4],[29] 3.3                            
Fair Value [3],[4],[29] $ 3.2                            
Investment, Identifier [Axis]: Wealth Enhancement Group LLC, Diversified Financials 3                              
Variable Rate [12] 6.00% 6.00% 6.00% 6.00% 6.00% 6.00% 6.00%                
Floor Rate [4],[29] 1.00% 1.00% 1.00% 1.00% 1.00% 1.00% 1.00%                
Principal Amount [4],[17],[29] $ 2.1                            
Amortized Cost [4],[29] 2.1                            
Fair Value [3],[4],[29] $ 2.0                            
Investment, Identifier [Axis]: Wealth Enhancement Group LLC, Senior Secured Loans—First Lien, Diversified Financials - 1                              
Variable Rate [24],[32]               6.25% 6.25% 6.25% 6.25% 6.25% 6.25% 6.25%  
Floor Rate [24],[32]               1.00% 1.00% 1.00% 1.00% 1.00% 1.00% 1.00%  
Principal Amount [6],[24],[32]               $ 15.1              
Amortized Cost [24],[32]               15.0              
Fair Value [2],[24],[32]               $ 15.1              
Investment, Identifier [Axis]: Wealth Enhancement Group LLC, Senior Secured Loans—First Lien, Diversified Financials -2                              
Floor Rate [24],[32]               1.00% 1.00% 1.00% 1.00% 1.00% 1.00% 1.00%  
Principal Amount [6],[24],[32]               $ 0.7              
Amortized Cost [24],[32]               0.7              
Fair Value [2],[24],[32]               $ 0.7              
Investment, Identifier [Axis]: Wealth Enhancement Group LLC, Senior Secured Loans—First Lien, Diversified Financials -3                              
Variable Rate [5],[24]               6.25% 6.25% 6.25% 6.25% 6.25% 6.25% 6.25%  
Floor Rate [5],[24]               1.00% 1.00% 1.00% 1.00% 1.00% 1.00% 1.00%  
Principal Amount [5],[6],[24]               $ 13.2              
Amortized Cost [5],[24]               13.2              
Fair Value [2],[5],[24]               $ 13.2              
Investment, Identifier [Axis]: Wealth Enhancement Group LLC, Senior Secured Loans—First Lien, Diversified Financials -4                              
Variable Rate [5],[24]               6.25% 6.25% 6.25% 6.25% 6.25% 6.25% 6.25%  
Floor Rate [5],[24]               1.00% 1.00% 1.00% 1.00% 1.00% 1.00% 1.00%  
Principal Amount [5],[6],[24]               $ 1.0              
Amortized Cost [5],[24]               1.0              
Fair Value [2],[5],[24]               $ 1.0              
Investment, Identifier [Axis]: Wittur Holding GmbH                              
Variable Rate [24],[32]               8.50% 8.50% 8.50% 8.50% 8.50% 8.50% 8.50%  
PIK Rate [24],[32]               0.50% 0.50% 0.50% 0.50% 0.50% 0.50% 0.50%  
Floor Rate [24],[32]               0.00% 0.00% 0.00% 0.00% 0.00% 0.00% 0.00%  
Principal Amount | € [6],[24],[32]                     € 112.8        
Amortized Cost [24],[32]               $ 120.9              
Fair Value [2],[24],[32]               $ 120.9              
Investment, Identifier [Axis]: Wittur Holding GmbH | Maximum                              
PIK Rate [24],[32]               0.50% 0.50% 0.50% 0.50% 0.50% 0.50% 0.50%  
Investment, Identifier [Axis]: Wittur Holding GmbH, Capital Goods                              
Variable Rate [12] 8.50% 8.50% 8.50% 8.50% 8.50% 8.50% 8.50%                
PIK Rate [12] 1.00% 1.00% 1.00% 1.00% 1.00% 1.00% 1.00%                
Floor Rate [15],[29] 0.00% 0.00% 0.00% 0.00% 0.00% 0.00% 0.00%                
Principal Amount | € [15],[17],[29]       € 113.4                      
Amortized Cost [15],[29] $ 122.5                            
Fair Value [3],[15],[29] $ 86.1                            
Investment, Identifier [Axis]: Wittur Holding GmbH, Capital Goods | Maximum                              
PIK Rate [12] 1.00% 1.00% 1.00% 1.00% 1.00% 1.00% 1.00%                
Investment, Identifier [Axis]: Woolpert Inc, Capital Goods 1                              
Variable Rate [12] 6.00% 6.00% 6.00% 6.00% 6.00% 6.00% 6.00%                
Floor Rate [13],[14],[18],[19],[40] 1.00% 1.00% 1.00% 1.00% 1.00% 1.00% 1.00%                
Principal Amount [13],[14],[17],[18],[19],[40] $ 91.0                            
Amortized Cost [13],[14],[18],[19],[40] 85.1                            
Fair Value [3],[13],[14],[18],[19],[40] $ 88.6                            
Investment, Identifier [Axis]: Woolpert Inc, Capital Goods 2                              
Variable Rate [12] 6.00% 6.00% 6.00% 6.00% 6.00% 6.00% 6.00%                
Floor Rate [15] 1.00% 1.00% 1.00% 1.00% 1.00% 1.00% 1.00%                
Principal Amount [15],[17] $ 68.5                            
Amortized Cost [15] 68.5                            
Fair Value [3],[15] $ 66.7                            
Investment, Identifier [Axis]: Woolpert Inc, Capital Goods 3                              
Variable Rate [12] 6.00% 6.00% 6.00% 6.00% 6.00% 6.00% 6.00%                
Floor Rate [4] 1.00% 1.00% 1.00% 1.00% 1.00% 1.00% 1.00%                
Principal Amount [4],[17] $ 3.7                            
Amortized Cost [4] 3.7                            
Fair Value [3],[4] $ 3.6                            
Investment, Identifier [Axis]: Woolpert Inc, Revolving Credit Facility, Senior Secured Loans—First Lien, Capital Goods -1                              
Variable Rate [8],[9],[32],[38],[39],[43]               6.00% 6.00% 6.00% 6.00% 6.00% 6.00% 6.00%  
Floor Rate [8],[9],[32],[38],[39],[43]               1.00% 1.00% 1.00% 1.00% 1.00% 1.00% 1.00%  
Principal Amount [6],[8],[9],[32],[38],[39],[43]               $ 139.2              
Amortized Cost [8],[9],[32],[38],[39],[43]               132.5              
Fair Value [2],[8],[9],[32],[38],[39],[43]               $ 141.2              
Investment, Identifier [Axis]: Woolpert Inc, Revolving Credit Facility, Senior Secured Loans—First Lien, Capital Goods -2                              
Variable Rate [5]               6.00% 6.00% 6.00% 6.00% 6.00% 6.00% 6.00%  
Floor Rate [5]               1.00% 1.00% 1.00% 1.00% 1.00% 1.00% 1.00%  
Principal Amount [5],[6]               $ 25.6              
Amortized Cost [5]               25.6              
Fair Value [2],[5]               $ 25.9              
Investment, Identifier [Axis]: Worldwise Inc, Class A Private Equity, Household & Personal Products                              
Number of Shares | shares [15],[28] 32,109 32,109 32,109 32,109 32,109 32,109 32,109                
Amortized Cost [15],[28] $ 1.6                            
Fair Value [1],[15],[28] $ 1.6                            
Investment, Identifier [Axis]: Worldwise Inc, Class B Private Equity, Household & Personal Products                              
Number of Shares | shares [15],[28] 32,109 32,109 32,109 32,109 32,109 32,109 32,109                
Amortized Cost [15],[28] $ 1.6                            
Fair Value [1],[15],[28] $ 0.4                            
Investment, Identifier [Axis]: Worldwise Inc, Household & Personal Products 1                              
Variable Rate [12] 6.25% 6.25% 6.25% 6.25% 6.25% 6.25% 6.25%                
Floor Rate [15] 1.00% 1.00% 1.00% 1.00% 1.00% 1.00% 1.00%                
Principal Amount [15],[17] $ 26.3                            
Amortized Cost [15] 26.3                            
Fair Value [3],[15] $ 24.4                            
Investment, Identifier [Axis]: Worldwise Inc, Household & Personal Products 2                              
Variable Rate [12] 6.25% 6.25% 6.25% 6.25% 6.25% 6.25% 6.25%                
Floor Rate [15] 1.00% 1.00% 1.00% 1.00% 1.00% 1.00% 1.00%                
Principal Amount [15],[17] $ 20.0                            
Amortized Cost [15] 19.8                            
Fair Value [3],[15] $ 18.5                            
Investment, Identifier [Axis]: Worldwise Inc, Household & Personal Products 3                              
Variable Rate [12] 6.25% 6.25% 6.25% 6.25% 6.25% 6.25% 6.25%                
Floor Rate [15] 1.00% 1.00% 1.00% 1.00% 1.00% 1.00% 1.00%                
Principal Amount [15],[17] $ 7.4                            
Amortized Cost [15] 7.4                            
Fair Value [3],[15] $ 6.8                            
Investment, Identifier [Axis]: Worldwise Inc, Household & Personal Products 4                              
Variable Rate [12] 6.25% 6.25% 6.25% 6.25% 6.25% 6.25% 6.25%                
Floor Rate [4] 1.00% 1.00% 1.00% 1.00% 1.00% 1.00% 1.00%                
Principal Amount [4],[17] $ 15.5                            
Amortized Cost [4] 15.5                            
Fair Value [3],[4] $ 14.4                            
Investment, Identifier [Axis]: Worldwise Inc, Household & Personal Products 5                              
Variable Rate [12] 6.25% 6.25% 6.25% 6.25% 6.25% 6.25% 6.25%                
Floor Rate [4] 1.00% 1.00% 1.00% 1.00% 1.00% 1.00% 1.00%                
Principal Amount [4],[17] $ 6.8                            
Amortized Cost [4] 6.8                            
Fair Value [3],[4] $ 6.3                            
Investment, Identifier [Axis]: Zendesk Inc, Software & Services 1                              
Variable Rate [12] 6.50% 6.50% 6.50% 6.50% 6.50% 6.50% 6.50%                
PIK Rate [12] 0.00% 0.00% 0.00% 0.00% 0.00% 0.00% 0.00%                
Floor Rate [15] 0.80% 0.80% 0.80% 0.80% 0.80% 0.80% 0.80%                
Principal Amount [15],[17] $ 58.1                            
Amortized Cost [15] 57.5                            
Fair Value [3],[15] $ 57.5                            
Investment, Identifier [Axis]: Zendesk Inc, Software & Services 1 | Maximum                              
PIK Rate [12] 3.50% 3.50% 3.50% 3.50% 3.50% 3.50% 3.50%                
Investment, Identifier [Axis]: Zendesk Inc, Software & Services 2                              
Variable Rate [12] 6.50% 6.50% 6.50% 6.50% 6.50% 6.50% 6.50%                
PIK Rate [12] 0.00% 0.00% 0.00% 0.00% 0.00% 0.00% 0.00%                
Floor Rate [4] 0.80% 0.80% 0.80% 0.80% 0.80% 0.80% 0.80%                
Principal Amount [4],[17] $ 14.5                            
Amortized Cost [4] 14.4                            
Fair Value [3],[4] $ 14.4                            
Investment, Identifier [Axis]: Zendesk Inc, Software & Services 2 | Maximum                              
PIK Rate [12] 3.50% 3.50% 3.50% 3.50% 3.50% 3.50% 3.50%                
Investment, Identifier [Axis]: Zendesk Inc, Software & Services 3                              
Variable Rate [12] 6.50% 6.50% 6.50% 6.50% 6.50% 6.50% 6.50%                
PIK Rate [12] 0.00% 0.00% 0.00% 0.00% 0.00% 0.00% 0.00%                
Floor Rate [4] 0.80% 0.80% 0.80% 0.80% 0.80% 0.80% 0.80%                
Principal Amount [4],[17] $ 6.0                            
Amortized Cost [4] 6.0                            
Fair Value [3],[4] $ 5.9                            
Investment, Identifier [Axis]: Zendesk Inc, Software & Services 3 | Maximum                              
PIK Rate [12] 3.50% 3.50% 3.50% 3.50% 3.50% 3.50% 3.50%                
Investment, Identifier [Axis]: Zeta Interactive Holdings Corp, Common Stock, Software & Services                              
Number of Shares | shares [23],[32],[36]               3,610,212 3,610,212 3,610,212 3,610,212 3,610,212 3,610,212 3,610,212  
Amortized Cost [23],[32],[36]               $ 30.8              
Fair Value [2],[23],[32],[36]               30.4              
Investment, Identifier [Axis]: athenahealth Inc 1                              
Fair Value $ 0.0             0.0              
Investment, Identifier [Axis]: athenahealth Inc 2                              
Fair Value $ 0.0             0.0              
Investment, Identifier [Axis]: athenahealth Inc, Preferred Stock                              
PIK Rate 10.80% 10.80% 10.80% 10.80% 10.80% 10.80% 10.80%                
Fair Value $ 231.2             $ 0.0              
Investment, Identifier [Axis]: athenahealth Inc, Preferred Stock | Maximum                              
PIK Rate 10.80% 10.80% 10.80% 10.80% 10.80% 10.80% 10.80%                
Investment, Identifier [Axis]: athenahealth Inc, Preferred Stock, Health Care Equipment & Services                              
PIK Rate [12],[15],[41] 10.80% 10.80% 10.80% 10.80% 10.80% 10.80% 10.80%                
Number of Shares | shares [15],[41] 267,493 267,493 267,493 267,493 267,493 267,493 267,493                
Amortized Cost [15],[41] $ 262.2                            
Fair Value [1],[15],[41] $ 231.2                            
Investment, Identifier [Axis]: athenahealth Inc, Preferred Stock, Health Care Equipment & Services | Maximum                              
PIK Rate [12],[15],[41] 10.80% 10.80% 10.80% 10.80% 10.80% 10.80% 10.80%                
Investment, Identifier [Axis]: hibu Inc                              
Variable Rate [8],[9],[32],[38],[39],[43]               6.25% 6.25% 6.25% 6.25% 6.25% 6.25% 6.25%  
Floor Rate [8],[9],[32],[38],[39],[43]               1.00% 1.00% 1.00% 1.00% 1.00% 1.00% 1.00%  
Principal Amount [6],[8],[9],[32],[38],[39],[43]               $ 101.6              
Amortized Cost [8],[9],[32],[38],[39],[43]               96.6              
Fair Value [2],[8],[9],[32],[38],[39],[43]               $ 104.6              
Investment, Identifier [Axis]: iNova Pharmaceuticals (Australia) Pty Limited, Pharmaceuticals, Biotechnology & Life Sciences                              
Variable Rate [12] 6.50% 6.50% 6.50% 6.50% 6.50% 6.50% 6.50%                
Floor Rate [4],[29] 0.80% 0.80% 0.80% 0.80% 0.80% 0.80% 0.80%                
Principal Amount [4],[17],[29]           $ 3.5                  
Amortized Cost [4],[29] $ 2.2                            
Fair Value [3],[4],[29] $ 2.2                            
[1] Fair value determined by the Company’s board of directors (see Note 8).
[2] Fair value determined by the Company’s board of directors (see Note 8).
[3] Listed investments may be treated as debt for GAAP or tax purposes.
[4] Security is an unfunded commitment. Reflects the stated spread at the time of commitment, but may not be the actual rate received upon funding.
[5] Security is an unfunded commitment. Reflects the stated spread at the time of commitment, but may not be the actual rate received upon funding.
[6] Denominated in U.S. dollars unless otherwise noted.
[7] Certain variable rate securities in the Company’s portfolio bear interest at a rate determined by a publicly disclosed base rate plus a basis point spread. As of December 31, 2020, the three-month London Interbank Offered Rate, or LIBOR or "L", was 0.21%, the Euro Interbank Offered Rate, or EURIBOR, was (0.57)%, Canadian Dollar Offer Rate, or CDOR, was 0.48%, the Bank Bill Swap Bid Rate, or BBSY was 0.12%, the Reykjavik Interbank Offered Rate, or REIBOR, was 2.65%, the Stockholm Interbank Offered Rate, or STIBOR, was (0.05)%, the Sterling Overnight Index Average, or SONIA, was 0.19%, the Secured Overnight Financing Rate, or SOFR, was 0.05%, and the U.S. Prime Lending Rate, or Prime, was 3.25%. PIK means paid-in-kind. PIK income accruals may be adjusted based on the fair value of the underlying investment.
[8] Security or portion thereof held within Darby Creek LLC and is pledged as collateral supporting the amounts outstanding under a revolving credit facility with Deutsche Bank AG, New York Branch (see Note 9).
[9] Security or portion thereof held within Dunlap Funding LLC and is pledged as collateral supporting the amounts outstanding under a revolving credit facility with Deutsche Bank AG, New York Branch (see Note 9).
[10] Security or portion thereof was held within CCT Tokyo Funding LLC and was pledged as collateral supporting the amounts outstanding under the revolving credit facility with Sumitomo Mitsui Banking Corporation (see Note 9).
[11] Security or portion thereof held within Cobbs Creek LLC and is pledged as collateral supporting the amounts outstanding under the senior secured revolving credit facility (see Note 9).
[12] Certain variable rate securities in the Company’s portfolio bear interest at a rate determined by a publicly disclosed base rate plus a basis point spread. As of December 31, 2022, the three-month London Interbank Offered Rate, or LIBOR or “L”, was 4.77%, the Euro Interbank Offered Rate, or EURIBOR, was 2.13%, Canadian Dollar Offer Rate, or CDOR was 4.94%, the Bank Bill Swap Bid Rate, or BBSY was 3.32%, the Reykjavik Interbank Offered Rate, or REIBOR, was 6.55%, the Stockholm Interbank Offered Rate, or STIBOR, was 2.70%, the Sterling Overnight Index Average, or SONIA, was 3.43%, the Secured Overnight Financing Rate, or SOFR, was 4.59%, and the U.S. Prime Lending Rate, or Prime, was 7.50%. PIK means paid-in-kind. PIK income accruals may be adjusted based on the fair value of the underlying investment.
[13] Security or portion thereof held within Darby Creek LLC and is pledged as collateral supporting the amounts outstanding under a revolving credit facility with Deutsche Bank AG, New York Branch (see Note 9).
[14] Security or portion thereof held within Dunlap Funding LLC and is pledged as collateral supporting the amounts outstanding under a revolving credit facility with Deutsche Bank AG, New York Branch (see Note 9).
[15] Security or portion thereof is pledged as collateral supporting the amounts outstanding under the Senior Secured Revolving Credit Facility (see Note 9).
[16] Security or portion thereof was held within CCT Tokyo Funding LLC and was pledged as collateral supporting the amounts outstanding under the revolving credit facility with Sumitomo Mitsui Banking Corporation (see Note 9).
[17] Denominated in U.S. dollars unless otherwise noted.
[18] Security or portion thereof held within Ambler Funding LLC and is pledged as collateral supporting the amounts outstanding under the revolving credit facility with Ally Bank (see Note 9).
[19] Security or portion thereof held within Meadowbrook Run LLC and is pledged as collateral supporting the amounts outstanding under a revolving credit facility with Morgan Stanley Senior Funding, Inc. (see Note 9).
[20] Asset is on non-accrual status.
[21] Security held within IC Arches Investments LLC, a wholly-owned subsidiary of the Company.
[22] Security held within IC II Arches Investments, LLC, a wholly-owned subsidiary of the Company.
[23] Security is non-income producing
[24] The investment is not a qualifying asset under the Investment Company Act of 1940, as amended. A business development company may not acquire any asset other than qualifying assets, unless, at the time the acquisition is made, qualifying assets represent at least 70% of the company’s total assets. As of December 31, 2021, 75.1% of the Company’s total assets represented qualifying assets.
[25] Asset is on non-accrual status.
[26] Security held within IC Arches Investments LLC, a wholly-owned subsidiary of the Company.
[27] Security held within IC II Arches Investments, LLC, a wholly-owned subsidiary of the Company.
[28] Security is non-income producing.
[29] The investment is not a qualifying asset under the Investment Company Act of 1940, as amended. A business development company may not acquire any asset other than qualifying assets, unless, at the time the acquisition is made, qualifying assets represent at least 70% of the company’s total assets. As of December 31, 2022, 75.3% of the Company’s total assets represented qualifying assets.
[30] Under the Investment Company Act of 1940, as amended, the Company generally is deemed to “control” a portfolio company if it owns more than 25% of the portfolio company’s voting securities or it has the power to exercise control over the management or policies of such portfolio company. As of December 31, 2022, the Company held investments in one portfolio company of which it is deemed to be an “affiliated person” and deemed to “control”. During the year ended December 31, 2022, the Company disposed of investments in one portfolio of which it was deemed to be an "affiliated person" and deemed to "control". The following table presents certain information with respect to investments in portfolio companies of which the Company was deemed to be an affiliated person and deemed to control for the year ended December 31, 2022:
Portfolio CompanyFair Value at December 31, 2021
Gross Additions(1)
Gross Reductions(2)
Net Realized Gain (Loss)Net Change in Unrealized Appreciation (Depreciation)Fair Value at December 31, 2022
Interest Income(3)
PIK Income(3)
Fee Income(3)
Dividend and Other Income(3)
Senior Secured Loans—First Lien
Amtek Global Technology Pte Ltd $34.8 $— $(24.3)$(4.3)$(2.3)$3.9 $— $— $— $— 
ATX Networks Corp46.8 0.4 (6.6)— — 40.6 3.2 1.0 — — 
HM Dunn Co Inc33.6 2.0 — — — 35.6 0.8 2.1 — — 
HM Dunn Co Inc2.0 — (2.0)— — — — — — — 
NCI Inc— 79.1 (21.9)(28.5)(0.6)28.1 6.5 0.4 — — 
One Call Care Management Inc(5)
5.0 — (4.7)— (0.3)— — — — — 
 Production Resource Group LLC 133.3 19.3 (0.3)— 0.2 152.5 12.9 8.0 — — 
 Production Resource Group LLC 0.1 — — — — 0.1 — — — — 
 Production Resource Group LLC 64.4 3.7 (0.6)— 0.6 68.1 6.4 2.0 — — 
 Production Resource Group LLC 20.2 11.1 (0.3)— 0.3 31.3 — 0.9 — — 
 Warren Resources Inc18.7 0.6 (0.2)— (0.5)18.6 2.5 0.2 — — 
Senior Secured Loans—Second Lien
Amtek Global Technology Pte Ltd— — — (39.1)39.1 — — — — — 
Other Senior Secured Debt
JW Aluminum Co81.0 0.2 — — (3.1)78.1 8.0 — — — 
One Call Care Management Inc(5)
23.5 — (21.6)— (1.9)— — — — — 
Subordinated Debt
ATX Networks Corp7.1 3.6 — — 11.2 21.9 1.6 1.5 — — 
Hilding Anders46.6 — — — (46.6)— — — — — 
Hilding Anders— — — — — — 0.3 — — — 
Hilding Anders— — — — — — 0.1 — — — 
Asset Based Finance
801 5th Ave, Seattle, Structure Mezzanine57.2 1.9 — — (0.2)58.9 4.7 1.7 — — 
801 5th Ave, Seattle, Private Equity23.1 — (0.1)— (16.7)6.3 — — — — 
Avenue One PropCo, Private Equity— 46.3 (16.2)— 0.9 31.0 — — — — 
Avida Holding AB, Common Stock52.3 — — — (9.7)42.6 — — — — 
Kilter Finance, Preferred Stock36.1 87.3 (24.0)0.7 (0.6)99.5 7.4 1.9 — — 
Kilter Finance, Private Equity0.5 — — — — 0.5 — — — — 
KKR Altitude II Offshore Aggregator LP, Partnership Interest— 44.4 — — 44.4 — — — — 
KKR Rocket Loans Aggregator LLC, Partnership Interest1.4 2.9 — — — 4.3 — — — 1.3 
My Community Homes SFR PropCo 2, Private Equity33.0 157.0 (105.7)— (5.3)79.0 — — — — 
Prime St LLC, Private Equity9.1 — (0.3)— (8.8)— — — — — 
Prime St LLC, Structured Mezzanine52.4 3.3 — — (12.2)43.5 3.2 3.1 — — 
Portfolio CompanyFair Value at December 31, 2021
Gross Additions(1)
Gross Reductions(2)
Net Realized Gain (Loss)Net Change in Unrealized Appreciation (Depreciation)Fair Value at December 31, 2022
Interest Income(3)
PIK Income(3)
Fee Income(3)
Dividend and Other Income(3)
Toorak Capital Funding LLC, Membership Interest1.7 — (1.7)(0.2)0.2 — — — — 0.3 
Roemanu LLC (FKA Toorak Capital Partners LLC), Private Equity199.3 78.3 — — (16.4)261.2 — — — 18.8 
Roemanu LLC (FKA Toorak Capital Partners LLC), Structured Mezzanine22.0 32.0 (54.0)— — — — 0.6 — — 
Credit Opportunities Partners JV, LLC
Credit Opportunities Partners JV, LLC1,396.2 175.0 — — (142.9)1,428.3 — — — 208.3 
Equity/Other
Amtek Global Technology Pte Ltd, Common Stock — — — — — — — — — — 
Amtek Global Technology Pte Ltd, Ordinary Shares — — — — — — — — — — 
Amtek Global Technology Pte Ltd, Private Equity— — — — — — — — — — 
ATX Networks Corp, Common Stock— 1.7 — — 27.5 29.2 — — — — 
ATX Networks Corp, Class B-1 Common Stock— 5.0 — — — 5.0 — — — — 
ATX Networks Corp, Class B-2 Common Stock— 4.0 — — 5.0 9.0 — — — — 
Hilding Anders, Class A Common Stock— — — — — — — — — — 
Hilding Anders, Class B Common Stock— — — — — — — — — — 
Hilding Anders, Class C Common Stock— — — — — — — — — — 
Hilding Anders, Equity Options— — — — — — — — — — 
HM Dunn Co Inc, Preferred Stock, Series A7.1 — — — 9.8 16.9 — — — — 
HM Dunn Co Inc, Preferred Stock, Series B— — — — — — — — — — 
JW Aluminum Co, Common Stock— — — — 2.4 2.4 — — — — 
JW Aluminum Co, Preferred Stock122.6 22.2 — — (32.3)112.5 0.6 19.7 — — 
NCI Inc, Class A-1 Common Stock(4)
— — — — — — — — — — 
NCI Inc, Class B-1 Common Stock(4)
— — — — — — — — — — 
NCI Inc, Class C Common Stock(4)
— 20.2 — — — 20.2 — — — — 
NCI Inc, Class I-1 Common Stock(4)
— — — — — — — — — — 
One Call Care Management Inc, Common Stock(5)
2.4 — (2.1)— (0.3)— — — — — 
One Call Care Management Inc, Preferred Stock A(5)
26.1 — (22.8)— (3.3)— — — — — 
One Call Care Management Inc, Preferred Stock B(5)
9.2 — (8.0)— (1.2)— — — — — 
PRG III LLC, Preferred Stock, Series A PIK17.4 — — — 88.3 105.7 — — — — 
PRG III LLC, Preferred Stock, Series B PIK— — — — — — — — — — 
Sound United LLC, Common Stock 77.5 — (17.3)— (60.2)— — — — — 
Portfolio CompanyFair Value at December 31, 2021
Gross Additions(1)
Gross Reductions(2)
Net Realized Gain (Loss)Net Change in Unrealized Appreciation (Depreciation)Fair Value at December 31, 2022
Interest Income(3)
PIK Income(3)
Fee Income(3)
Dividend and Other Income(3)
Warren Resources Inc, Common Stock 20.4 — — — 8.8 29.2 — — — — 
Total$2,684.1 $801.5 $(334.7)$(71.4)$(171.1)$2,908.4 $58.2 $43.1 $— $228.7 
______________
(1)Gross additions include increases in the cost basis of investments resulting from new portfolio investments, PIK interest, the amortization of unearned income, the exchange of one or more existing securities for one or more new securities and the movement of an existing portfolio company into this category from a different category.
(2)Gross reductions include decreases in the cost basis of investments resulting from principal collections related to investment repayments or sales, the exchange of one or more existing securities for one or more new securities and the movement of an existing portfolio company out of this category into a different category.
(3)Interest, PIK, fee and dividend and other income presented for the full year ended December 31, 2022.
(4)The Company held this investment as of December 31, 2021 but it was not deemed to be an “control” of the portfolio company as of December 31, 2021. Transfers in or out have been presented at amortized cost.
(5)The Company held this investment as of December 31, 2022 but it was not deemed to be an “control” of the portfolio company as of December 31, 2022. Transfers in or out have been presented at amortized cost.
[31] Under the Investment Company Act of 1940, as amended, the Company generally is deemed to “control” a portfolio company if it owns more than 25% of the portfolio company’s voting securities or it has the power to exercise control over the management or policies of such portfolio company. As of December 31, 2021, the Company held investments in one portfolio company of which it is deemed to be an “affiliated person” and deemed to “control”. During the year ended December 31, 2021, the Company disposed of investments in one portfolio of which it was deemed to be an "affiliated person" and deemed to "control". The following table presents certain information with respect to investments in portfolio companies of which the Company was deemed to be an affiliated person and deemed to control as of December 31, 2021:
Portfolio CompanyFair Value at December 31, 2020
Gross Additions(1)
Gross Reductions(2)
Net Realized Gain (Loss)Net Change in Unrealized Appreciation (Depreciation)Fair Value at December 31, 2021
Interest Income(3)
PIK Income(3)
Fee Income(3)
Dividend Income(3)
Senior Secured Loans—First Lien
Advanced Lighting Technologies Inc$12.0 $4.1 $(15.9)$(4.6)$4.4 $— $— $— $— $— 
Amtek Global Technology Pte Ltd59.7 2.4 — — (27.3)34.8 1.1 1.4 — — 
ATX Networks Corp— 46.8 — — — 46.8 1.3 — — — 
 HM Dunn Co Inc(4)
— 49.2 (7.1)(8.5)— 33.6 0.5 — — — 
 HM Dunn Co Inc(4)
— 14.0 (19.0)7.0 — 2.0 0.4 0.8 — — 
One Call Care Management Inc— 9.7 (5.1)0.1 0.3 5.0 0.3 — 0.1 — 
Production Resource Group LLC— 124.9 — — 8.4 133.3 5.4 3.8 — — 
Production Resource Group LLC— 0.1 — — — 0.1 — — — — 
Production Resource Group LLC— 60.6 (0.4)— 4.2 64.4 2.8 0.8 0.4 — 
Production Resource Group LLC— 20.2 (0.1)— 0.1 20.2 0.4 — 0.1 — 
Sound United LLC14.9 — (15.0)— 0.1 — 0.4 — — — 
 Warren Resources Inc(4)
— 19.3 (2.0)0.1 1.3 18.7 1.3 0.1 — — 
Senior Secured Loans—Second Lien
Amtek Global Technology Pte Ltd0.1 (1.8)— (10.4)12.1 — (1.9)— — — 
Sound United LLC20.9 1.7 (22.6)— — — — 1.0 — — 
Other Senior Secured Debt
Advanced Lighting Technologies Inc— — (0.7)(22.9)23.6 — — — — — 
JW Aluminum Co(4)
— 75.5 — — 5.5 81.0 6.2 — — — 
One Call Care Management Inc(4)
— 43.5 (21.9)— 1.9 23.5 0.4 1.6 — — 
Subordinated Debt
ATX Networks Corp— 4.8 — — 2.3 7.1 — — — — 
Hilding Anders32.4 — — — 14.2 46.6 — — — — 
Hilding Anders— — — — — — — — — — 
Portfolio CompanyFair Value at December 31, 2020
Gross Additions(1)
Gross Reductions(2)
Net Realized Gain (Loss)Net Change in Unrealized Appreciation (Depreciation)Fair Value at December 31, 2021
Interest Income(3)
PIK Income(3)
Fee Income(3)
Dividend Income(3)
Hilding Anders30.3 — — — (30.3)— — — — — 
Asset Based Finance
801 5th Ave, Seattle, Structure Mezzanine29.4 25.7 — — 2.1 57.2 3.6 1.3 — — 
801 5th Ave, Seattle, Private Equity10.3 9.6 — — 3.2 23.1 — — — — 
Avida Holding AB, Common Stock38.3 9.1 — — 4.9 52.3 — — — — 
Kilter Finance, Preferred Stock0.2 34.4 — — 1.5 36.1 1.3 1.2 — — 
Kilter Finance, Private Equity0.2 0.3 — — — 0.5 — — — — 
KKR Rocket Loans Aggregator LLC, Partnership Interest— 1.4 — — — 1.4 — — — 0.1 
My Community Homes SFR PropCo 2, Private Equity— 33.0 — — — 33.0 — — — — 
Prime St LLC, Private Equity3.9 4.6 — — 0.6 9.1 — — — — 
Prime St LLC, Structured Mezzanine22.8 27.6 — — 2.0 52.4 0.9 2.2 — — 
Toorak Capital Funding LLC, Membership Interest6.6 1.3 (4.9)— (1.3)1.7 — — — — 
Toorak Capital LLC, Membership Interest235.9 2.3 (50.2)10.2 1.1 199.3 — — — 18.7 
Toorak Capital Partners LLC, Structured Mezzanine— 73.0 (51.0)— — 22.0 0.2 — — — 
Credit Opportunities Partners JV, LLC
Credit Opportunities Partners JV, LLC712.5 586.4 — — 97.3 1,396.2 — — — 126.9 
Equity/Other
Advanced Lighting Technologies Inc, Common Stock— — — (16.5)16.5 — — — — — 
Advanced Lighting Technologies Inc, Warrant— — — (0.1)0.1 — — — — — 
Amtek Global Technology Pte Ltd, Common Stock— — — — — — — — — — 
Amtek Global Technology Pte Ltd, Ordinary Shares— — — — — — — — — — 
Amtek Global Technology Pte Ltd, Trade Claim— — (1.4)0.4 1.0 — — — — — 
Amtek Global Technology Pte Ltd, Private Equity— — — — — — — — — — 
ATX Networks Corp, Common Stock— — — — — — — — — — 
Hilding Anders, Class A Common Stock— — — — — — — — — — 
Hilding Anders, Class B Common Stock— — — — — — — — — — 
Hilding Anders, Class C Common Stock— — — — — — — — — — 
Hilding Anders, Equity Options— — — — — — — — — — 
 HM Dunn Co Inc, Preferred Stock, Series A(4)
— 7.1 — — — 7.1 — — — — 
 HM Dunn Co Inc, Preferred Stock, Series B(4)
— — — — — — — — — — 
 JW Aluminum Co, Common Stock(4)
— — — — — — — — — — 
 JW Aluminum Co, Preferred Stock(4)
— 177.9 — — (55.3)122.6 0.4 20.9 — — 
 One Call Care Management Inc, Common Stock(4)
— 4.5 (2.2)(0.2)0.3 2.4 — — — — 
 One Call Care Management Inc, Preferred Stock A(4)
— 48.6 (23.7)(2.1)3.3 26.1 — — — — 
 One Call Care Management Inc, Preferred Stock B(4)
— 15.7 (8.8)1.1 1.2 9.2 — 0.8 — — 
Production Resource Group LLC, Preferred Stock, Series A PIK— 18.1 — — (0.7)17.4 — — — — 
Portfolio CompanyFair Value at December 31, 2020
Gross Additions(1)
Gross Reductions(2)
Net Realized Gain (Loss)Net Change in Unrealized Appreciation (Depreciation)Fair Value at December 31, 2021
Interest Income(3)
PIK Income(3)
Fee Income(3)
Dividend Income(3)
Production Resource Group LLC, Preferred Stock, Series B PIK— — — — — — — — — — 
Sound United LLC, Class A Units— — — (1.1)1.1 — — — — — 
Sound United LLC, Common Stock29.3 — — — 48.2 77.5 — — — 20.0 
Sound United LLC, Series I Units— — — (0.5)0.5 — — — — — 
Sound United LLC, Series II Units— — — (0.5)0.5 — — — — — 
Warren Resources Inc, Common Stock— 12.8 — — 7.6 20.4 — — — — 
Total$1,259.7 $1,568.4 $(252.0)$(48.5)$156.5 $2,684.1 $25.0 $35.9 $0.6 $165.7 
[32] Security or portion thereof is pledged as collateral supporting the amounts outstanding under the Senior Secured Revolving Credit Facility (see Note 9).
[33] Security or portion thereof held within Juniata River LLC and is pledged as collateral supporting the amounts outstanding under a term loan credit facility with JPMorgan Chase Bank, N.A. (see Note 9).
[34] Security or portion thereof held within Juniata River LLC and is pledged as collateral supporting the amounts outstanding under a term loan credit facility with JPMorgan Chase Bank, N.A. (see Note 9).
[35] Position or portion thereof unsettled as of unsettled as of December 31, 2022.
[36] Security is classified as Level 1 or 2 in the Company's fair value hierarchy (see Note 8).
[37] Security is classified as Level 1 or 2 in the Company's fair value hierarchy (see Note 8).
[38] Security or portion thereof held within Meadowbrook Run LLC and is pledged as collateral supporting the amounts outstanding under a revolving credit facility with Morgan Stanley Senior Funding, Inc. (see Note 9).
[39] Security or portion thereof was held within FSK CLO as of December 31, 2021.
[40] Security or portion thereof was held within FSK CLO as of December 31, 2022.
[41] Under the Investment Company Act of 1940, as amended, the Company generally is deemed to be an “affiliated person” of a portfolio company if it owns 5% or more of the portfolio company’s voting securities and generally is deemed to “control” a portfolio company if it owns more than 25% of the portfolio company’s voting securities or it has the power to exercise control over the management or policies of such portfolio company. As of December 31, 2022, the Company held investments in portfolio companies of which it is deemed to be an “affiliated person” but is not deemed to “control”. The following table presents certain information with respect to investments in portfolio companies of which the Company was deemed to be an affiliated person for the year ended December 31, 2022:
Portfolio CompanyFair Value at December 31, 2021
Gross Additions(1)
Gross Reductions(2)
Net Realized Gain (Loss)Net Change in Unrealized Appreciation (Depreciation)Fair Value at December 31, 2022
Interest Income(3)
PIK Income(3)
Fee Income(3)
Dividend and Other Income(3)
Senior Secured Loans—First Lien
Affordable Care Inc $— $— $— $— $— $— $— $— $— $— 
Affordable Care Inc 59.9 16.2 (21.4)— (1.6)53.1 4.1 — 0.2 — 
athenahealth Inc— 6.8 (6.1)(0.7)— — 0.2 — 0.2 — 
Belk Inc 49.2 4.7 (2.2)(0.2)(42.7)8.8 3.7 2.7 — — 
Belk Inc 21.9 0.1 — — (2.6)19.4 2.2 — — — 
Portfolio CompanyFair Value at December 31, 2021
Gross Additions(1)
Gross Reductions(2)
Net Realized Gain (Loss)Net Change in Unrealized Appreciation (Depreciation)Fair Value at December 31, 2022
Interest Income(3)
PIK Income(3)
Fee Income(3)
Dividend and Other Income(3)
Borden (New Dairy Opco) 9.0 — (9.0)0.6 (0.6)— 0.1 — 0.3 — 
Borden (New Dairy Opco) 42.0 0.1 (42.0)1.7 (1.8)— 0.9 — 1.3 — 
Borden Dairy Co— — — (25.4)25.4 — — — — — 
Constellis Holdings LLC 15.0 0.4 — — (0.4)15.0 1.8 — — — 
Fairway Group Holdings Corp 0.7 — — (1.0)0.3 — — — — — 
Fairway Group Holdings Corp — — — — — — — — — — 
Micronics Filtration Holdings Inc 51.0 5.7 (51.7)— (5.0)— 0.2 0.3 — — 
Petroplex Acidizing Inc9.7 — (16.7)(5.3)12.3 — — — — — 
Sorenson Communications LLC(4)
60.1 — (56.9)— (3.2)— — — — — 
Sungard Availability Services Capital Inc(4)
6.0 0.1 — — (5.6)0.5 — — — — 
Sungard Availability Services Capital Inc(4)
— 4.5 (2.5)— — 2.0 0.3 0.2 0.3 — 
ThermaSys Corp 3.5 — — — 5.1 8.6 — — — — 
Senior Secured Loans—Second Lien
 Belk Inc 6.7 — — — (3.4)3.3 — — — — 
 Constellis Holdings LLC 12.0 0.3 — — 1.2 13.5 2.0 — — — 
 Fairway Group Holdings Corp — — — — — — — — — — 
 Sungard Availability Services Capital Inc(4)
8.3 — (0.2)— (8.1)— — — — — 
Subordinated Debt
athenahealth Inc— 5.5 (4.7)(0.8)— — 0.1 — — — 
Asset Based Finance
 Home Partners JV, Structured Mezzanine90.4 7.9 (98.1)4.6 (4.8)— 0.3 7.5 — — 
 Home Partners JV, Private Equity 9.4 — (11.8)6.4 (4.0)— — — — 0.7 
 Home Partners JV, Common Stock 80.6 — (101.0)53.4 (33.0)— — — — 4.3 
 Home Partners JV 2, Structured Mezzanine3.5 6.7 — 0.1 (0.1)10.2 — 0.7 — — 
 Home Partners JV 2, Private Equity 0.1 0.1 — — — 0.2 — — — — 
 Home Partners JV 2, Private Equity 1.6 2.9 — — 0.5 5.0 — — — — 
 Jet Edge International LLC, Preferred Stock 16.8 — (30.1)9.2 4.1 — 0.7 — — — 
 Jet Edge International LLC, Warrant 4.5 — (13.5)13.5 (4.5)— — — — 1.5 
 Jet Edge International LLC, Term Loan 75.6 — (75.9)— 0.3 — 11.6 2.3 3.3 — 
 Orchard Marine Limited, Class B Common Stock — — — (3.1)3.1 — — — — — 
 Orchard Marine Limited, Series A Preferred Stock 64.6 0.1 (66.0)3.9 (2.6)— — — — — 
Equity/Other
Affordable Care Inc, Common Stock 52.1 — — — (2.2)49.9 — 5.5 — — 
athenahealth Inc, Preferred Stock— 311.3 (47.5)(1.6)(31.0)231.2 — 29.0— — 
Belk Inc, Common Stock — — — — — — — — — — 
Portfolio CompanyFair Value at December 31, 2021
Gross Additions(1)
Gross Reductions(2)
Net Realized Gain (Loss)Net Change in Unrealized Appreciation (Depreciation)Fair Value at December 31, 2022
Interest Income(3)
PIK Income(3)
Fee Income(3)
Dividend and Other Income(3)
 Borden (New Dairy Opco), Common Stock 7.7 — — — (2.9)4.8 — — — — 
 Constellis Holdings LLC, Private Equity 0.2 — — — 6.1 6.3 — — — — 
 Fairway Group Holdings Corp, Common Stock — — — — — — — — — — 
 Fronton BV, Common Stock 1.4 — — — (0.4)1.0 — — — — 
 Micronics Filtration Holdings Inc, Common Stock — — (0.1)(0.5)0.6 — — — — — 
 Micronics Filtration Holdings Inc, Preferred Stock, Series A 0.1 — — (0.6)0.5 — — — — — 
 Micronics Filtration Holdings Inc, Preferred Stock, Series B 0.4 — (0.4)0.2 (0.2)— — — — — 
 Micronics Filtration Holdings Inc, Preferred Stock, Series B PIK 11.9 — (11.9)11.9 (11.9)— — — — — 
 Micronics Filtration Holdings Inc, Preferred Stock, Series C PIK 6.2 — (6.2)6.2 (6.2)— — — — — 
 Petroplex Acidizing Inc, Preferred Stock A — — — (4.9)4.9 — — — — — 
 Petroplex Acidizing Inc, Warrant — — — — — — — — — — 
 Proserv Acquisition LLC, Class A Common Units 0.1 0.1 — — 0.9 1.1 — — — — 
 Proserv Acquisition LLC, Class A Preferred Units 9.3 — — — 0.2 9.5 — — — — 
 Sorenson Communications LLC, Common Stock(4)
67.5 — (65.4)22.9 (25.0)— — — — — 
 Sungard Availbaility Services Capital Inc, Common Stock(4)
— — — (6.9)6.9 — — — — — 
 ThermaSys Corp, Common Stock — — — — — — — — — — 
 ThermaSys Corp, Preferred Stock — — — — — — — — — — 
Total$859.0 $373.5 $(741.3)$83.6 $(131.4)$443.4 $28.2 $48.2 $5.6 $6.5 
______________
(1)Gross additions include increases in the cost basis of investments resulting from new portfolio investments, PIK interest, the amortization of unearned income, the exchange of one or more existing securities for one or more new securities and the movement of an existing portfolio company into this category from a different category.
(2)Gross reductions include decreases in the cost basis of investments resulting from principal collections related to investment repayments or sales, the exchange of one or more existing securities for one or more new securities and the movement of an existing portfolio company out of this category into a different category.
(3)Interest, PIK, fee and dividend and other income presented for the full year ended December 31, 2022.
(4)The Company held this investment as of December 31, 2021 but it was not deemed to be an “affiliated person” of the portfolio company as of December 31, 2021. Transfers in or out have been presented at amortized cost.
[42] Under the Investment Company Act of 1940, as amended, the Company generally is deemed to be an “affiliated person” of a portfolio company if it owns 5% or more of the portfolio company’s voting securities and generally is deemed to “control” a portfolio company if it owns more than 25% of the portfolio company’s voting securities or it has the power to exercise control over the management or policies of such portfolio company. As of December 31, 2021, the Company held investments in portfolio companies of which it is deemed to be an “affiliated person” but is not deemed to “control”. The following table presents certain information with respect to investments in portfolio companies of which the Company was deemed to be an affiliated person as of December 31, 2021:
Portfolio CompanyFair Value at December 31, 2020
Gross Additions(1)
Gross Reductions(2)
Net Realized Gain (Loss)Net Change in Unrealized Appreciation (Depreciation)Fair Value at December 31, 2021
Interest Income(3)
PIK Income(3)
Fee Income(3)
Dividend Income(3)
Senior Secured Loans—First Lien
Portfolio CompanyFair Value at December 31, 2020
Gross Additions(1)
Gross Reductions(2)
Net Realized Gain (Loss)Net Change in Unrealized Appreciation (Depreciation)Fair Value at December 31, 2021
Interest Income(3)
PIK Income(3)
Fee Income(3)
Dividend Income(3)
Affordable Care Inc$ $— $— $— $— $— $— $— $0.3 $— 
Affordable Care Inc— 115.5 (55.9)0.3 — 59.9 2.7 — 1.6 — 
Belk Inc— 42.6 (2.4)— 9.0 49.2 3.1 0.9 — — 
Belk Inc— 21.7 — — 0.2 21.9 1.6 — — — 
Borden (New Dairy Opco)7.6 10.6 (10.0)0.2 0.6 9.0 0.5 — — — 
Borden (New Dairy Opco)16.8 23.4 — — 1.8 42.0 2.7 — — — 
Borden Dairy Co— — — 1.3 (1.3)— — — — — 
Constellis Holdings LLC— 14.0 — — 1.0 15.0 0.9 — — — 
Fairway Group Holdings Corp— 1.1 (0.7)0.6 (0.3)0.7 0.8 — — — 
Fairway Group Holdings Corp— — — — — — — — — — 
 HM Dunn Co Inc(5)
0.3 — (0.6)— 0.3 — — — — — 
 HM Dunn Co Inc(5)
0.2 — (0.3)— 0.1 — — — — — 
Micronics Filtration Holdings Inc35.5 1.0 — — 14.5 51.0 — 1.0 — — 
 One Call Care Management Inc(5)
4.7 0.6 (4.9)— (0.4)— 0.2 — — — 
Petroplex Acidizing Inc4.5 — (0.2)— 5.4 9.7 — — — — 
 Sorenson Communications LLC(4)
— 61.8 (5.1)0.2 3.2 60.1 2.8 — — — 
 Sungard Availability Services Capital Inc(4)
— 5.7 — — 0.3 6.0 0.2 0.1 — — 
ThermaSys Corp3.9 0.4 — — (0.8)3.5 — 0.5 — — 
Senior Secured Loans—Second Lien
Belk Inc— 4.2 — — 2.5 6.7 — — — — 
Constellis Holdings LLC— 12.5 — — (0.5)12.0 0.6 0.4 — — 
Fairway Group Holdings Corp— — — — — — — — — — 
Sorenson Communications LLC— 22.0 (22.2)0.2 — — 0.4 0.9 — — 
Sungard Availability Services Capital Inc— 13.6 0.1 — (5.4)8.3 0.7 0.2 — — 
Other Senior Secured Debt
JW Aluminum Co(5)
41.8 — (39.4)— (2.4)— — — — — 
Subordinated Debt
Home Partners of America Inc— 3.5 (3.5)— — — 0.1 — — — 
Asset Based Finance
Home Partners JV, Structured Mezzanine38.5 83.4 (36.3)— 4.8 90.4 0.6 7.3 — — 
Home Partners JV, Private Equity— 5.4 — — 4.0 9.4 — — — — 
Home Partners JV, Private Equity— — — (0.6)0.6 — — — — — 
Home Partners JV, Common Stock21.5 45.9 (22.9)7.7 28.4 80.6 — — — — 
Home Partners JV 2, Structured Mezzanine— 3.4 — — 0.1 3.5 — 0.2 — — 
Home Partners JV 2, Private Equity— 0.1 — — — 0.1 — — — — 
Home Partners JV 2, Private Equity— 1.5 — — 0.1 1.6 — — — — 
Jet Edge International LLC, Preferred Stock— 20.9 — — (4.1)16.8 0.5 — — — 
Portfolio CompanyFair Value at December 31, 2020
Gross Additions(1)
Gross Reductions(2)
Net Realized Gain (Loss)Net Change in Unrealized Appreciation (Depreciation)Fair Value at December 31, 2021
Interest Income(3)
PIK Income(3)
Fee Income(3)
Dividend Income(3)
Jet Edge International LLC, Warrant— — — — 4.5 4.5 — — — — 
Jet Edge International LLC, Term Loan— 78.0 (2.1)— (0.3)75.6 2.4 0.5 — — 
Orchard Marine Limited, Class B Common Stock— — — — — — — — — — 
Orchard Marine Limited, Series A Preferred Stock24.6 — — — 40.0 64.6 — — — — 
Equity/Other
Affordable Care Inc, Common Stock— 48.1 — — 4.0 52.1 — 2.3 — — 
ASG Technologies, Common Stock42.7 — (79.4)56.0 (19.3)— — — — — 
ASG Technologies, Warrants3.5 — (10.2)3.7 3.0 — — — — — 
Belk Inc, Common Stock— — — — — — — — — — 
Borden (New Dairy Opco), Common Stock3.2 5.2 — — (0.7)7.7 — — — — 
Charlotte Russe Inc, Common Stock— — — (12.5)12.5 — — — — — 
Constellis Holdings LLC, Private Equity— 10.3 — — (10.1)0.2 — — — — 
Fairway Group Holdings Corp, Common Stock— — — — — — — — — — 
Fronton BV, Common Stock1.2 — — — 0.2 1.4 — — — — 
 HM Dunn Co Inc, Preferred Stock, Series A(5)
— — — — — — — — — — 
 HM Dunn Co Inc, Preferred Stock, Series B(5)
— — — — — — — — — — 
Home Partners of America Inc, Common Stock130.5 — (214.3)130.7 (46.9)— — — — — 
Home Partners of America Inc, Warrant2.1 — (4.4)4.1 (1.8)— — — — — 
 JW Aluminum Co, Common Stock(5)
— — — — — — — — — — 
 JW Aluminum Co, Preferred Stock(5)
93.7 — (107.3)— 13.6 — — 4.2 — — 
Micronics Filtration Holdings Inc, Common Stock— — — — — — — — — — 
Micronics Filtration Holdings Inc, Preferred Stock, Series A— — — — 0.1 0.1 — — — — 
Micronics Filtration Holdings Inc, Preferred Stock, Series B— — — — 0.4 0.4 — — — — 
Micronics Filtration Holdings Inc, Preferred Stock, Series B PIK— — — — 11.9 11.9 — — — — 
Micronics Filtration Holdings Inc, Preferred Stock, Series C PIK— — — — 6.2 6.2 — — — — 
 One Call Care Management Inc, Common Stock(5)
2.4 — (3.0)— 0.6 — — — — — 
 One Call Care Management Inc, Preferred Stock A(5)
25.5 — (32.3)— 6.8 — — — — — 
 One Call Care Management Inc, Preferred Stock B(5)
10.6 — (9.8)— (0.8)— — — — — 
Petroplex Acidizing Inc, Preferred Stock A— 0.4 — — (0.4)— — — — 0.4 
Petroplex Acidizing Inc, Warrant— — — — — — — — — — 
Proserv Acquisition LLC, Class A Common Units9.0 — (0.1)— (8.8)0.1 — — — — 
Proserv Acquisition LLC, Class A Preferred Units9.5 — — — (0.2)9.3 — — — — 
 Sorenson Communications LLC, Common Stock(4)
— 42.5 — — 25.0 67.5 — — — — 
Sungard Availability Services Capital Inc, Common Stock(4)
— 6.9 — — (6.9)— — — — — 
ThermaSys Corp, Common Stock— — — — — — — — — — 
ThermaSys Corp, Preferred Stock— — — — — — — — — — 
Total$533.8 $706.2 $(667.2)$191.9 $94.3 $859.0 $20.8 $18.5 $1.9 $0.4 
[43] Security or portion thereof held within Ambler Funding LLC and is pledged as collateral supporting the amounts outstanding under the revolving credit facility with Ally Bank (see Note 9).
[44] Security or portion thereof was held within CCT Dublin Funding Limited
[45] Security or portion thereof was held within CCT Dublin Funding Limited
[46] Security held within CCT Holdings II, LLC, a wholly-owned subsidiary of the Company.
[47] Security held within CCT Holdings II, LLC, a wholly-owned subsidiary of the Company.
[48] Security held within IC American Energy Investments, Inc., a wholly-owned subsidiary of the Company.
[49] Security held within IC American Energy Investments, Inc., a wholly-owned subsidiary of the Company.
[50] Security held within FSIC II Investments, Inc., a wholly-owned subsidiary of the Company.
[51] Security held within FSIC II Investments, Inc., a wholly-owned subsidiary of the Company.
[52] Security or portion thereof held within Race Street Funding LLC. Security is available as collateral supporting the amounts outstanding under the Senior Secured Revolving Credit Facility (see Note 9).
[53] Security or portion thereof held within Race Street Funding LLC. Security is available as collateral supporting the amounts outstanding under the Senior Secured Revolving Credit Facility (see Note 9).
[54] Security or portion thereof held within Cobbs Creek LLC and is pledged as collateral supporting the amounts outstanding under the senior secured revolving credit facility (see Note 9).
[55] Security held within FSIC Investments, Inc., a wholly-owned subsidiary of the Company.
[56] Security held within FSIC Investments, Inc., a wholly-owned subsidiary of the Company.
[57] The Company held this investment as of December 31, 2020 but it was not deemed to be an “control” of the portfolio company as of December 31, 2020. Transfers in or out have been presented at amortized cost.
[58] The Company held this investment as of December 31, 2021 but it was deemed to "control" the portfolio company as of December 31, 2021. Transfers in or out have been presented at amortized cost.
[59] The Company held this investment as of December 31, 2021 but it was not deemed to be an “control” of the portfolio company as of December 31, 2021. Transfers in or out have been presented at amortized cost.(5)The Company held this investment as of December 31, 2022 but it was not deemed to be an “control” of the portfolio company as of December 31, 2022. Transfers in or out have been presented at amortized cost.
[60] The Company held this investment as of December 31, 2022 but it was not deemed to be an “control” of the portfolio company as of December 31, 2022. Transfers in or out have been presented at amortized cost.
[61] The Company held this investment as of December 31, 2021 but it was not deemed to be an “affiliated person” of the portfolio company as of December 31, 2021. Transfers in or out have been presented at amortized cost.
[62] The Company held this investment as of December 31, 2020 but it was not deemed to be an “affiliated person” of the portfolio company as of December 31, 2020. Transfers in or out have been presented at amortized cost.